$data <<EOF
10/1996	12.37	12.86	12.14	12.14	-1.86%
11/1996	12.14	13.38	12.14	13.27	9.31%
12/1996	13.27	13.27	12.03	12.96	-2.34%
01/1997	12.96	13.38	12.34	13.22	2.01%
02/1997	13.22	14.77	13.22	14.77	11.72%
03/1997	14.77	16.16	14.77	15.60	5.62%
04/1997	15.60	17.30	15.18	17.30	10.90%
05/1997	17.30	18.85	17.15	17.97	3.87%
06/1997	17.97	19.00	17.20	18.90	5.18%
07/1997	18.90	22.00	18.90	20.19	6.83%
08/1997	20.19	21.23	18.08	18.33	-9.21%
09/1997	18.33	20.40	18.23	20.40	11.29%
10/1997	20.40	20.97	17.04	18.28	-10.39%
11/1997	18.28	21.07	18.28	21.07	15.26%
12/1997	21.07	22.00	20.19	22.00	4.41%
01/1998	22.00	26.08	22.00	25.31	15.05%
02/1998	25.31	31.97	25.20	27.32	7.94%
03/1998	27.32	27.32	25.10	26.08	-4.54%
04/1998	26.08	28.87	24.63	26.34	1.00%
05/1998	26.34	27.42	24.79	25.25	-4.14%
06/1998	25.25	28.30	24.79	28.15	11.49%
07/1998	28.15	28.40	26.60	28.38	0.82%
08/1998	28.38	29.28	26.03	26.75	-5.74%
09/1998	26.75	26.96	24.79	25.05	-6.36%
10/1998	25.05	27.11	21.79	27.11	8.22%
11/1998	27.11	28.40	25.82	28.40	4.76%
12/1998	28.40	29.70	26.54	29.64	4.37%
01/1999	29.64	32.73	29.59	29.90	0.88%
02/1999	29.90	31.21	28.28	30.00	0.33%
03/1999	30.00	31.72	27.78	31.72	5.73%
04/1999	31.72	32.93	28.48	28.58	-9.90%
05/1999	28.58	29.19	26.26	27.78	-2.80%
06/1999	27.78	29.59	26.87	27.27	-1.84%
07/1999	27.27	28.53	23.79	24.04	-11.84%
08/1999	24.04	26.77	23.23	25.96	7.99%
09/1999	25.96	27.07	24.95	25.20	-2.93%
10/1999	25.20	28.79	24.95	28.79	14.25%
11/1999	28.79	31.11	28.28	30.60	6.29%
12/1999	30.60	30.91	26.77	27.88	-8.89%
01/2000	27.88	30.50	25.86	26.97	-3.26%
02/2000	26.97	27.07	23.28	25.15	-6.75%
03/2000	25.15	30.40	24.24	29.70	18.09%
04/2000	29.70	34.65	29.70	33.84	13.94%
05/2000	33.84	33.84	30.60	30.60	-9.57%
06/2000	30.60	31.31	28.08	31.31	2.32%
07/2000	31.31	32.12	29.29	31.82	1.63%
08/2000	31.82	33.53	31.21	32.42	1.89%
09/2000	32.42	33.84	31.31	33.84	4.38%
10/2000	33.84	35.86	33.03	33.33	-1.51%
11/2000	33.33	35.35	32.83	33.33	0.00%
12/2000	33.33	33.43	29.80	30.71	-7.86%
01/2001	30.71	30.71	27.27	28.48	-7.26%
02/2001	28.48	31.41	28.48	30.60	7.44%
03/2001	30.60	30.60	27.27	29.59	-3.30%
04/2001	29.59	30.71	28.48	30.71	3.79%
05/2001	30.71	32.12	29.70	32.12	4.59%
06/2001	32.12	33.33	32.12	33.33	3.77%
07/2001	33.33	33.84	32.12	33.33	0.00%
08/2001	33.33	33.33	29.29	29.29	-12.12%
09/2001	29.29	31.01	27.07	31.01	5.87%
10/2001	31.01	31.72	29.70	30.30	-2.29%
11/2001	30.30	31.31	28.58	28.58	-5.68%
12/2001	28.58	29.24	27.47	28.79	0.73%
01/2002	28.79	29.19	27.39	28.28	-1.77%
02/2002	28.28	30.00	27.83	28.79	1.80%
03/2002	28.79	28.84	27.13	27.17	-5.63%
04/2002	27.17	27.68	26.31	26.97	0.74%
05/2002	26.97	26.97	21.92	21.92	-18.72%
06/2002	21.92	22.22	20.73	22.22	1.37%
07/2002	22.22	22.22	16.57	19.80	-10.89%
08/2002	19.80	21.92	19.19	19.19	-3.08%
09/2002	19.19	20.71	17.78	19.29	0.52%
10/2002	19.29	22.22	18.99	19.39	0.52%
11/2002	19.39	20.50	18.99	19.19	-1.03%
12/2002	19.19	19.19	17.42	17.42	-9.22%
01/2003	17.42	19.29	15.76	17.78	2.07%
02/2003	17.78	18.18	16.16	16.16	-9.11%
03/2003	16.16	17.73	14.80	15.96	-1.24%
04/2003	15.96	18.69	15.96	18.08	13.28%
05/2003	18.08	19.24	17.17	17.17	-5.03%
06/2003	17.17	18.59	17.17	17.68	2.97%
07/2003	17.68	17.98	16.67	17.27	-2.32%
08/2003	17.27	18.03	16.72	17.78	2.95%
09/2003	17.78	18.84	17.68	18.38	3.37%
10/2003	18.38	18.79	17.88	18.18	-1.09%
11/2003	18.18	20.10	18.18	19.60	7.81%
12/2003	19.60	19.70	18.08	18.38	-6.22%
01/2004	18.38	18.79	17.63	17.68	-3.81%
02/2004	17.68	17.88	16.67	17.07	-3.45%
03/2004	17.07	17.27	16.11	16.21	-5.04%
04/2004	16.21	18.03	16.21	17.73	9.38%
05/2004	17.73	18.28	17.47	17.68	0.28%
06/2004	17.68	18.03	17.11	17.27	-2.32%
07/2004	17.27	17.27	16.06	16.82	-2.61%
08/2004	16.82	17.27	15.98	17.12	1.78%
09/2004	17.12	17.93	16.82	17.83	4.15%
10/2004	17.83	17.83	16.26	16.57	-7.07%
11/2004	16.57	17.37	16.16	16.26	-1.87%
12/2004	16.26	17.68	16.26	17.29	6.33%
01/2005	17.29	17.93	17.12	17.17	0.69%
02/2005	17.17	19.04	17.17	18.38	7.05%
03/2005	18.38	19.19	17.88	17.88	-2.72%
04/2005	17.88	19.75	17.73	19.75	10.46%
05/2005	19.75	20.25	19.29	20.25	2.53%
06/2005	20.25	20.81	20.15	20.30	0.25%
07/2005	20.30	20.40	19.24	20.10	0.99%
08/2005	20.10	20.20	19.29	19.72	-1.89%
09/2005	19.72	21.51	19.72	21.51	9.08%
10/2005	21.51	22.12	20.91	22.07	2.60%
11/2005	22.07	23.23	21.10	21.41	-2.99%
12/2005	21.41	22.22	21.41	21.82	1.91%
01/2006	21.82	22.32	20.76	21.36	-2.11%
02/2006	21.36	22.17	21.31	21.72	1.69%
03/2006	21.72	23.33	21.72	22.07	1.61%
04/2006	22.07	22.68	21.41	22.68	2.76%
05/2006	22.68	22.88	21.62	21.72	-4.23%
06/2006	21.72	22.32	21.41	21.97	1.15%
07/2006	21.97	22.61	21.51	21.92	0.23%
08/2006	21.92	22.52	21.21	22.52	2.74%
09/2006	22.52	22.52	21.21	21.21	-5.82%
10/2006	21.21	22.78	21.16	21.16	0.24%
11/2006	21.16	21.51	19.90	20.45	-3.36%
12/2006	20.45	20.45	19.84	20.10	-1.71%
01/2007	20.10	21.77	20.10	20.91	4.03%
02/2007	20.91	22.63	20.91	21.67	3.63%
03/2007	21.67	21.72	20.44	20.81	-3.97%
04/2007	20.81	22.32	20.81	21.46	3.12%
05/2007	21.46	21.72	19.40	19.46	-9.32%
06/2007	19.46	19.90	19.19	19.54	0.41%
07/2007	19.54	19.65	18.18	18.89	-3.33%
08/2007	18.89	19.39	18.38	19.39	2.65%
09/2007	19.39	19.79	18.82	18.82	-2.94%
10/2007	18.82	19.44	17.75	17.92	-4.78%
11/2007	17.92	18.28	16.46	18.28	2.01%
12/2007	18.28	18.74	17.73	17.73	-3.01%
01/2008	17.73	18.63	16.06	16.06	-9.42%
02/2008	16.06	16.06	14.60	14.60	-9.09%
03/2008	14.60	14.65	13.20	13.53	-7.33%
04/2008	13.53	14.60	13.53	14.51	7.24%
05/2008	14.51	14.95	14.14	14.39	0.83%
06/2008	14.39	14.44	13.52	14.14	-1.74%
07/2008	14.14	15.91	14.14	15.00	6.08%
08/2008	15.00	16.55	15.00	16.07	7.13%
09/2008	16.07	16.32	15.05	15.29	-4.85%
10/2008	15.29	15.83	12.93	15.71	2.75%
11/2008	15.71	15.71	12.73	13.64	-13.18%
12/2008	13.64	14.37	12.81	12.98	-4.84%
01/2009	12.98	14.53	12.98	13.84	6.63%
02/2009	13.84	14.49	12.12	12.12	-12.43%
03/2009	12.12	12.12	10.61	11.71	-3.38%
04/2009	11.71	12.42	11.18	12.01	2.56%
05/2009	12.01	12.47	11.62	12.10	0.75%
06/2009	12.10	13.38	12.06	12.76	5.45%
07/2009	12.76	13.99	12.46	13.79	8.07%
08/2009	13.79	14.28	13.40	13.84	0.36%
09/2009	13.84	13.92	13.25	13.71	0.94%
10/2009	13.71	14.25	13.24	14.25	3.94%
11/2009	14.25	14.45	13.74	14.00	-1.75%
12/2009	14.00	14.95	14.00	14.80	5.71%
01/2010	14.80	15.03	14.24	14.29	-3.45%
02/2010	14.29	14.51	13.71	13.71	-4.06%
03/2010	13.71	14.62	13.71	14.19	3.50%
04/2010	14.19	14.92	14.04	14.04	-1.06%
05/2010	14.04	14.39	13.13	13.71	-2.35%
06/2010	13.71	14.85	13.71	14.02	2.26%
07/2010	14.02	14.34	13.34	13.84	-1.28%
08/2010	13.84	15.55	13.83	14.89	7.59%
09/2010	14.89	15.71	14.52	14.75	0.94%
10/2010	14.75	15.22	14.14	14.14	-4.14%
11/2010	14.14	14.92	14.06	14.66	3.68%
12/2010	14.66	15.31	14.51	15.15	3.34%
01/2011	15.15	15.15	13.64	13.64	-9.97%
02/2011	13.64	14.44	13.46	14.11	3.45%
03/2011	14.11	14.12	13.25	13.71	-2.83%
04/2011	13.71	14.91	13.71	14.91	8.75%
05/2011	14.91	15.65	14.53	15.09	1.21%
06/2011	15.09	15.09	14.54	14.95	0.93%
07/2011	14.95	15.97	14.86	15.92	6.49%
08/2011	15.92	15.92	14.02	14.95	-6.09%
09/2011	14.95	15.76	14.65	15.48	3.55%
10/2011	15.48	16.41	15.40	16.41	6.01%
11/2011	16.41	16.66	15.86	16.58	1.04%
12/2011	16.58	17.78	16.58	17.71	6.82%
01/2012	17.71	18.25	17.25	17.25	-2.60%
02/2012	17.25	17.38	16.74	16.74	-2.96%
03/2012	16.74	17.47	16.74	16.90	0.96%
04/2012	16.90	18.03	16.90	17.73	4.91%
05/2012	17.73	18.08	17.61	18.05	1.80%
06/2012	18.05	18.57	17.37	18.09	0.22%
07/2012	18.09	19.18	18.09	18.95	4.75%
08/2012	18.95	19.19	18.21	18.21	-3.91%
09/2012	18.21	18.37	17.71	18.19	0.11%
10/2012	18.19	18.40	17.41	17.44	-4.12%
11/2012	17.44	17.67	16.57	16.75	-3.96%
12/2012	16.75	17.15	16.59	16.82	0.42%
01/2013	16.82	17.08	16.67	16.95	0.77%
02/2013	16.95	17.27	16.79	17.13	1.06%
03/2013	17.13	18.43	17.11	18.43	7.59%
04/2013	18.43	20.27	18.08	19.81	7.49%
05/2013	19.81	20.98	19.53	20.32	2.57%
06/2013	20.32	20.32	18.86	19.34	-4.82%
07/2013	19.34	20.40	19.34	19.42	0.41%
08/2013	19.42	19.98	19.42	19.55	0.67%
09/2013	19.55	19.98	18.80	18.80	-3.84%
10/2013	18.80	19.39	18.38	19.39	3.14%
11/2013	19.39	20.07	19.31	19.70	1.60%
12/2013	19.70	19.75	18.65	19.45	-1.27%
01/2014	19.45	20.44	19.19	19.25	-1.03%
02/2014	19.25	20.90	19.09	20.53	6.65%
03/2014	20.53	20.81	19.44	19.57	-4.68%
04/2014	19.57	20.50	18.95	20.07	2.55%
05/2014	20.07	20.43	19.85	19.93	0.70%
06/2014	19.93	20.32	19.65	19.80	0.65%
07/2014	19.80	20.19	18.15	18.35	-7.32%
08/2014	18.35	18.94	17.52	18.94	3.22%
09/2014	18.94	18.94	18.15	18.40	-2.85%
10/2014	18.40	18.53	16.99	18.10	-1.63%
11/2014	18.10	18.88	18.10	18.84	4.09%
12/2014	18.84	19.14	16.57	17.91	-4.94%
01/2015	17.91	20.30	17.62	19.87	10.94%
02/2015	19.87	21.53	19.47	21.48	8.10%
03/2015	21.48	22.94	21.43	21.71	1.07%
04/2015	21.71	23.18	20.98	20.98	-3.36%
05/2015	20.98	21.21	19.85	20.56	-2.00%
06/2015	20.56	20.56	18.94	19.19	-6.66%
07/2015	19.19	20.20	18.95	20.01	4.27%
08/2015	20.01	20.91	17.67	18.69	-6.60%
09/2015	18.69	18.69	17.02	17.30	-7.44%
10/2015	17.30	19.98	17.30	19.90	15.03%
11/2015	19.90	19.96	18.87	19.50	-2.01%
12/2015	19.50	19.81	17.87	18.94	-2.87%
01/2016	18.94	19.03	17.84	18.94	0.00%
02/2016	18.94	19.65	17.43	18.06	-4.65%
03/2016	18.06	18.66	17.89	17.99	0.39%
04/2016	17.99	19.30	17.65	18.71	4.00%
05/2016	18.71	19.46	18.50	19.11	2.14%
06/2016	19.11	19.54	17.91	19.54	2.25%
07/2016	19.54	20.78	19.39	20.45	4.66%
08/2016	20.45	20.59	19.40	19.73	-3.52%
09/2016	19.73	20.04	19.16	19.32	-2.08%
10/2016	19.32	19.80	18.28	18.28	-5.38%
11/2016	18.28	18.60	17.64	18.21	0.38%
12/2016	18.21	18.88	17.51	18.60	2.14%
01/2017	18.60	18.89	18.11	18.34	-1.40%
02/2017	18.34	19.95	18.34	19.78	7.85%
03/2017	19.78	20.01	19.51	19.95	0.86%
04/2017	19.95	19.96	19.05	19.05	-4.51%
05/2017	19.05	19.95	18.98	19.76	3.73%
06/2017	19.76	20.10	19.09	19.12	-3.24%
07/2017	19.12	19.12	17.38	17.38	-9.10%
08/2017	17.38	17.58	16.55	17.04	-1.96%
09/2017	17.04	17.41	16.76	17.28	1.41%
10/2017	17.28	17.60	15.91	16.02	-7.29%
11/2017	16.02	16.02	14.90	15.03	-6.18%
12/2017	15.03	15.34	14.88	15.15	0.80%
01/2018	15.15	15.85	15.15	15.45	1.98%
02/2018	15.45	15.45	14.53	15.22	-1.49%
03/2018	15.22	16.22	14.86	16.21	6.50%
04/2018	16.21	16.98	16.06	16.88	4.13%
05/2018	16.88	17.62	16.65	17.62	4.38%
06/2018	17.62	18.40	17.27	17.56	0.34%
07/2018	17.56	18.10	17.36	18.02	2.62%
08/2018	18.02	18.31	17.49	17.70	-1.78%
09/2018	17.70	17.81	16.87	17.67	0.17%
10/2018	17.67	17.90	16.69	17.36	-1.75%
11/2018	17.36	18.68	17.30	18.48	6.45%
12/2018	18.48	18.48	16.26	16.80	-9.09%
01/2019	16.80	17.46	16.77	17.17	2.20%
02/2019	17.17	18.32	17.16	17.99	4.78%
03/2019	17.99	18.90	17.73	18.79	4.45%
04/2019	18.79	18.95	17.90	18.41	-2.02%
05/2019	18.41	18.47	17.49	17.49	-5.00%
06/2019	17.49	18.27	17.47	17.91	2.40%
07/2019	17.91	19.15	17.91	18.87	5.36%
08/2019	18.87	19.13	18.11	19.13	1.38%
09/2019	19.13	19.93	18.59	19.93	4.18%
10/2019	19.93	20.79	18.99	20.79	4.32%
11/2019	20.79	20.90	20.04	20.83	0.19%
12/2019	20.83	21.63	20.22	21.35	2.50%
01/2020	21.35	21.92	20.88	21.44	0.42%
02/2020	21.44	21.70	18.30	18.30	-14.65%
03/2020	18.30	19.65	15.09	17.44	-4.70%
04/2020	17.44	20.08	17.33	19.55	12.10%
05/2020	19.55	20.20	18.72	19.01	-2.76%
06/2020	19.01	19.13	18.07	18.19	-4.31%
07/2020	18.19	18.59	17.25	17.48	-3.90%
08/2020	17.48	17.98	16.86	16.87	-3.49%
09/2020	16.87	17.14	16.15	16.40	-2.79%
10/2020	16.40	16.40	14.60	14.60	-10.98%
11/2020	14.60	16.76	14.60	15.90	8.90%
12/2020	15.90	15.97	15.09	15.53	-2.33%
01/2021	15.53	16.36	15.53	15.66	0.84%
02/2021	15.66	15.80	14.14	14.14	-9.71%
03/2021	14.14	15.66	14.14	15.58	10.18%
04/2021	15.58	16.00	15.23	15.84	1.67%
05/2021	15.84	16.57	15.74	16.32	3.03%
06/2021	16.32	17.13	15.94	16.97	3.98%
07/2021	16.97	17.23	16.69	17.03	0.35%
08/2021	17.03	18.26	17.03	17.37	2.00%
09/2021	17.37	17.66	16.46	16.59	-4.49%
10/2021	16.59	18.18	16.59	18.14	9.34%
11/2021	18.14	19.13	17.92	18.10	0.22%
12/2021	18.10	19.84	18.10	19.84	9.61%
01/2022	19.84	20.61	19.41	19.98	0.71%
02/2022	19.98	20.30	17.47	18.69	-6.46%
03/2022	18.69	20.00	18.04	19.94	6.69%
04/2022	19.94	21.88	19.94	21.80	9.33%
05/2022	21.80	21.80	20.30	20.65	-5.28%
06/2022	20.65	21.15	19.84	20.91	1.26%
07/2022	20.91	21.46	20.17	20.73	0.86%
08/2022	20.73	20.73	16.37	16.45	-20.65%
09/2022	16.45	16.45	14.80	15.15	-7.90%
10/2022	15.15	16.98	15.15	16.98	12.08%
11/2022	16.98	17.10	15.50	16.60	-2.24%
12/2022	16.60	17.48	16.18	16.24	-2.17%
01/2023	16.24	16.84	15.92	16.32	0.49%
02/2023	16.32	17.06	16.06	16.10	-1.35%
03/2023	16.10	16.32	15.50	16.22	0.75%
04/2023	16.22	17.30	16.21	16.34	0.74%
05/2023	16.34	16.91	15.68	15.68	-4.04%
06/2023	15.68	16.51	15.65	16.10	2.68%
07/2023	16.10	16.30	15.35	15.97	0.81%
08/2023	15.97	16.14	15.47	16.14	1.06%
09/2023	16.14	17.80	16.05	17.07	5.76%
10/2023	17.07	17.60	16.38	16.67	-2.34%
11/2023	16.67	16.68	15.74	16.32	-2.10%
12/2023	16.32	16.89	16.32	16.68	2.21%
01/2024	16.68	18.40	16.68	18.30	9.71%
02/2024	18.30	20.00	18.30	19.50	6.56%
03/2024	19.50	19.85	19.00	19.85	1.79%
04/2024	19.85	19.85	18.23	19.40	-2.27%
05/2024	19.40	21.09	19.40	20.49	5.62%
06/2024	20.49	20.49	17.91	17.91	-12.59%
07/2024	17.91	18.48	17.60	17.94	0.17%
08/2024	17.94	19.73	17.71	19.73	9.98%
09/2024	19.73	19.85	18.10	18.59	-5.78%
10/2024	18.59	18.59	16.79	16.79	-9.68%
11/2024	16.79	17.06	15.80	16.12	-3.99%
12/2024	16.12	16.77	15.95	16.40	1.74%
01/2025	16.40	16.93	15.41	16.93	3.23%
02/2025	16.93	18.10	16.67	17.99	6.26%
03/2025	17.99	18.52	17.62	17.62	-2.06%
04/2025	17.62	17.62	14.91	17.48	0.79%
05/2025	17.48	17.86	16.21	17.86	2.17%
06/2025	17.86	18.24	16.35	16.37	-8.34%
07/2025	16.37	17.01	15.52	16.27	0.61%
08/2025	16.27	17.10	15.78	16.80	3.26%
09/2025	16.80	18.15	16.71	18.15	8.04%
10/2025	18.15	20.17	18.15	20.17	11.13%
11/2025	20.17	20.67	19.60	20.54	1.83%
12/2025	20.54	21.05	20.20	21.00	2.24%
EOF

set term pdf size 22,13
set term pdf font "sans,20"
set output "GlaxoSmithKline_stock_price.pdf"
set grid
set key top left
set xdata time
set timefmt "%m/%Y"
set format x "%b %Y"
set xtics rotate by -90 
set xtics 365.25*24*60*60/1	# 1 tics per year

wd = 15.25*24*60*60	# 15.25 days box width
set style fill transparent solid 0.8
plot $data using 1:(($3+$4)/2):(wd):(($4-$3)/2) with boxxyerror lw 1 lc 3 title "GlaxoSmithKline [GB00BN7SWP63] "