$data <<EOF
04/1998	15.28	15.28	15.28	15.28	0.00%
05/1998	15.28	15.28	15.28	15.28	0.00%
06/1998	15.28	15.28	15.28	15.28	0.00%
07/1998	15.28	18.68	15.28	18.28	19.63%
08/1998	18.28	18.28	14.41	14.41	-21.17%
09/1998	14.41	16.48	14.41	16.48	14.37%
10/1998	16.48	18.68	16.48	18.68	13.35%
11/1998	18.68	18.95	18.42	18.42	-1.39%
12/1998	18.42	24.69	18.42	24.69	34.04%
01/1999	24.69	26.49	22.71	23.88	-3.28%
02/1999	23.88	25.14	22.71	24.01	0.54%
03/1999	24.01	24.01	22.11	22.16	-7.71%
04/1999	22.16	22.97	18.53	19.58	-11.64%
05/1999	19.58	19.58	18.92	19.58	0.00%
06/1999	19.58	19.58	18.22	18.53	-5.36%
07/1999	18.53	18.53	15.27	16.45	-11.23%
08/1999	16.45	17.54	15.51	17.23	4.74%
09/1999	17.23	17.31	16.05	16.05	-6.85%
10/1999	16.05	17.23	14.88	15.27	-4.86%
11/1999	15.27	19.19	15.27	18.79	23.05%
12/1999	18.79	20.36	18.25	18.40	-2.08%
01/2000	18.40	18.40	14.25	14.25	-22.55%
02/2000	14.25	15.27	14.25	15.27	7.16%
03/2000	15.27	17.23	14.88	15.43	1.05%
04/2000	15.43	16.05	14.45	14.45	-6.35%
05/2000	14.45	15.11	14.10	14.33	0.83%
06/2000	14.33	15.27	14.33	14.72	2.72%
07/2000	14.72	14.72	14.10	14.17	-3.74%
08/2000	14.17	14.49	14.10	14.25	0.56%
09/2000	14.25	14.96	13.70	14.25	0.00%
10/2000	14.25	15.66	14.25	15.11	6.04%
11/2000	15.11	16.05	14.10	14.96	0.99%
12/2000	14.96	16.05	14.88	15.58	4.14%
01/2001	15.58	15.98	14.72	15.27	-1.99%
02/2001	15.27	15.82	14.49	14.49	-5.11%
03/2001	14.49	14.49	13.16	13.63	-5.94%
04/2001	13.63	14.49	13.31	14.49	6.31%
05/2001	14.49	15.04	14.41	14.57	0.55%
06/2001	14.57	14.88	14.10	14.88	2.13%
07/2001	14.88	15.74	14.49	15.66	5.24%
08/2001	15.66	16.64	15.35	15.35	-1.98%
09/2001	15.35	16.45	14.33	15.27	0.52%
10/2001	15.27	15.51	14.49	15.27	0.00%
11/2001	15.27	15.58	13.90	14.25	-6.68%
12/2001	14.25	15.66	14.25	14.57	2.25%
01/2002	14.57	15.90	13.94	15.90	9.13%
02/2002	15.90	16.05	15.27	15.77	0.82%
03/2002	15.77	15.77	14.88	15.19	-3.68%
04/2002	15.19	17.23	15.19	17.23	13.43%
05/2002	17.23	17.38	15.04	15.04	-12.71%
06/2002	15.04	15.66	14.49	15.04	0.00%
07/2002	15.04	15.43	12.37	13.16	-12.50%
08/2002	13.16	14.96	13.16	14.25	8.28%
09/2002	14.25	14.25	13.31	13.31	-6.60%
10/2002	13.31	14.33	13.31	13.70	2.93%
11/2002	13.70	15.66	13.31	15.51	13.21%
12/2002	15.51	15.51	14.41	14.49	-6.58%
01/2003	14.49	15.43	14.21	14.33	-1.10%
02/2003	14.33	14.60	14.02	14.25	0.56%
03/2003	14.25	14.33	11.75	11.90	-16.49%
04/2003	11.90	13.70	11.90	13.70	15.13%
05/2003	13.70	13.70	13.31	13.39	-2.26%
06/2003	13.39	14.21	13.39	13.70	2.32%
07/2003	13.70	13.86	13.08	13.16	-3.94%
08/2003	13.16	13.35	13.04	13.31	1.14%
09/2003	13.31	13.53	12.84	12.84	-3.53%
10/2003	12.84	13.04	12.61	12.96	0.93%
11/2003	12.96	13.51	12.96	13.51	4.24%
12/2003	13.51	14.72	13.31	14.72	8.96%
01/2004	14.72	14.88	14.29	14.72	0.00%
02/2004	14.72	15.70	14.72	15.62	6.11%
03/2004	15.62	16.37	15.43	15.66	0.26%
04/2004	15.66	16.45	15.66	16.05	2.49%
05/2004	16.05	16.45	15.39	15.39	-4.11%
06/2004	15.39	15.82	15.11	15.54	0.97%
07/2004	15.54	15.54	14.88	14.88	-4.25%
08/2004	14.88	15.31	14.76	15.27	2.62%
09/2004	15.27	15.74	15.27	15.70	2.82%
10/2004	15.70	16.91	15.62	16.91	7.71%
11/2004	16.91	16.91	16.37	16.68	-1.36%
12/2004	16.68	17.93	16.68	17.89	7.25%
01/2005	17.89	17.93	16.91	17.23	-3.69%
02/2005	17.23	18.40	17.23	17.54	1.80%
03/2005	17.54	17.62	16.86	17.46	0.46%
04/2005	17.46	17.78	16.91	16.95	-2.92%
05/2005	16.95	17.93	16.95	17.93	5.78%
06/2005	17.93	18.79	17.71	18.79	4.80%
07/2005	18.79	19.61	18.48	19.34	2.93%
08/2005	19.34	19.42	18.52	18.79	-2.84%
09/2005	18.79	19.42	18.48	18.83	0.21%
10/2005	18.83	19.19	16.89	17.62	-6.43%
11/2005	17.62	18.36	17.55	18.36	4.20%
12/2005	18.36	18.56	17.67	18.30	0.33%
01/2006	18.30	18.68	17.96	18.61	1.69%
02/2006	18.61	20.63	18.61	20.19	8.49%
03/2006	20.19	20.19	18.64	18.68	-7.48%
04/2006	18.68	19.15	18.44	18.91	1.23%
05/2006	18.91	19.30	17.85	18.13	-4.12%
06/2006	18.13	18.70	17.15	18.70	3.14%
07/2006	18.70	20.05	17.50	19.85	6.15%
08/2006	19.85	20.67	19.37	20.44	2.97%
09/2006	20.44	23.88	20.42	22.51	10.13%
10/2006	22.51	24.20	22.51	24.20	7.51%
11/2006	24.20	25.84	24.03	24.12	0.33%
12/2006	24.12	25.06	23.02	23.30	-3.40%
01/2007	23.30	24.43	22.80	23.96	2.83%
02/2007	23.96	26.52	23.96	25.29	5.55%
03/2007	25.29	27.17	24.99	26.82	6.05%
04/2007	26.82	29.95	26.82	28.95	7.94%
05/2007	28.95	34.89	28.95	34.46	19.03%
06/2007	34.46	35.48	31.79	35.16	2.03%
07/2007	35.16	35.36	32.51	32.51	-7.54%
08/2007	32.51	32.97	30.12	30.55	-6.03%
09/2007	30.55	31.17	27.72	30.76	0.69%
10/2007	30.76	33.81	30.04	33.10	7.61%
11/2007	33.10	33.75	32.07	33.11	0.03%
12/2007	33.11	34.28	31.57	31.95	-3.50%
01/2008	31.95	32.04	27.08	29.44	-7.86%
02/2008	29.44	33.09	27.98	31.33	6.42%
03/2008	31.33	31.81	27.80	31.34	0.03%
04/2008	31.34	31.44	28.83	29.22	-6.76%
05/2008	29.22	29.59	27.85	29.18	0.14%
06/2008	29.18	29.18	27.46	29.05	0.45%
07/2008	29.05	29.05	24.67	24.67	-15.08%
08/2008	24.67	25.18	23.79	24.79	0.49%
09/2008	24.79	24.79	20.34	20.34	-17.95%
10/2008	20.34	21.48	15.83	18.18	-10.62%
11/2008	18.18	20.07	16.56	16.56	-8.91%
12/2008	16.56	16.56	14.85	14.85	-10.33%
01/2009	14.85	17.18	14.85	14.92	0.47%
02/2009	14.92	14.92	11.66	11.70	-21.58%
03/2009	11.70	11.70	7.82	9.47	-19.06%
04/2009	9.47	11.45	9.42	11.18	18.06%
05/2009	11.18	12.12	11.13	11.73	4.92%
06/2009	11.73	11.93	10.85	11.93	1.71%
07/2009	11.93	12.16	10.97	12.02	0.75%
08/2009	12.02	13.66	12.02	13.58	12.98%
09/2009	13.58	13.75	12.80	13.75	1.25%
10/2009	13.75	13.75	12.57	12.75	-7.27%
11/2009	12.75	13.18	12.65	12.74	0.08%
12/2009	12.74	13.91	12.74	13.91	9.18%
01/2010	13.91	14.39	13.25	13.39	-3.74%
02/2010	13.39	13.39	12.06	12.12	-9.48%
03/2010	12.12	12.98	12.12	12.53	3.38%
04/2010	12.53	12.80	11.47	11.68	-6.78%
05/2010	11.68	11.75	10.46	10.91	-6.59%
06/2010	10.91	12.14	10.80	10.86	0.46%
07/2010	10.86	12.04	10.49	11.83	8.93%
08/2010	11.83	12.29	10.72	10.83	-8.45%
09/2010	10.83	11.27	9.96	10.14	-6.37%
10/2010	10.14	10.14	9.40	9.71	-4.24%
11/2010	9.71	10.23	9.52	9.55	-1.65%
12/2010	9.55	10.75	9.55	10.55	10.47%
01/2011	10.55	11.28	9.50	11.08	5.02%
02/2011	11.08	11.75	11.00	11.46	3.43%
03/2011	11.46	12.25	11.05	12.23	6.72%
04/2011	12.23	12.84	12.16	12.76	4.33%
05/2011	12.76	12.93	11.91	12.50	-2.04%
06/2011	12.50	13.86	12.19	13.86	10.88%
07/2011	13.86	14.18	13.07	13.14	-5.19%
08/2011	13.14	13.14	11.14	11.98	-8.83%
09/2011	11.98	12.11	10.52	12.06	0.67%
10/2011	12.06	13.23	11.82	12.84	6.47%
11/2011	12.84	12.84	11.28	12.08	-5.92%
12/2011	12.08	12.71	11.92	12.67	4.88%
01/2012	12.67	13.04	11.72	11.85	-6.47%
02/2012	11.85	12.43	11.85	12.10	2.11%
03/2012	12.10	12.26	11.28	11.37	-6.03%
04/2012	11.37	11.37	9.73	10.06	-11.52%
05/2012	10.06	10.06	8.76	8.81	-12.43%
06/2012	8.81	10.06	8.60	10.06	14.19%
07/2012	10.06	10.14	8.60	9.91	-1.49%
08/2012	9.91	10.70	9.59	9.79	-1.21%
09/2012	9.79	12.38	9.79	11.15	13.89%
10/2012	11.15	12.00	11.15	11.96	7.26%
11/2012	11.96	12.27	11.76	12.10	1.17%
12/2012	12.10	13.81	11.97	13.63	12.64%
01/2013	13.63	15.01	13.43	14.89	9.24%
02/2013	14.89	15.33	14.28	15.16	1.81%
03/2013	15.16	15.74	13.74	13.74	-9.37%
04/2013	13.74	16.01	13.69	15.83	15.21%
05/2013	15.83	16.49	15.83	16.04	1.33%
06/2013	16.04	16.15	14.95	15.25	-4.93%
07/2013	15.25	15.52	13.86	15.28	0.20%
08/2013	15.28	15.73	14.80	14.80	-3.14%
09/2013	14.80	15.51	14.62	15.34	3.65%
10/2013	15.34	17.48	15.34	17.30	12.78%
11/2013	17.30	18.25	17.30	18.22	5.32%
12/2013	18.22	18.65	17.46	18.65	2.36%
01/2014	18.65	19.17	17.96	18.23	-2.25%
02/2014	18.23	18.73	17.81	18.56	1.81%
03/2014	18.56	20.37	18.39	20.37	9.75%
04/2014	20.37	20.86	19.80	20.57	0.98%
05/2014	20.57	21.32	20.18	21.02	2.19%
06/2014	21.02	23.49	21.02	23.24	10.56%
07/2014	23.24	23.24	21.88	22.80	-1.89%
08/2014	22.80	23.43	21.59	23.25	1.97%
09/2014	23.25	24.30	23.07	23.33	0.34%
10/2014	23.33	23.33	20.66	23.00	-1.41%
11/2014	23.00	23.00	22.04	22.79	0.91%
12/2014	22.79	22.98	20.16	20.83	-8.60%
01/2015	20.83	21.48	18.77	20.61	-1.06%
02/2015	20.61	21.50	20.17	21.50	4.32%
03/2015	21.50	21.63	20.56	20.88	-2.88%
04/2015	20.88	22.41	20.88	21.89	4.84%
05/2015	21.89	22.70	21.12	22.39	2.28%
06/2015	22.39	22.39	20.30	20.30	-9.33%
07/2015	20.30	20.94	19.23	19.76	-2.66%
08/2015	19.76	20.30	17.89	18.07	-8.55%
09/2015	18.07	18.58	17.11	17.41	-3.65%
10/2015	17.41	19.86	17.41	19.73	13.33%
11/2015	19.73	20.46	19.08	20.46	3.70%
12/2015	20.46	20.46	18.16	18.95	-7.38%
01/2016	18.95	18.95	16.89	17.97	-5.17%
02/2016	17.97	18.05	15.18	16.05	-10.68%
03/2016	16.05	17.86	16.05	17.71	10.34%
04/2016	17.71	18.53	16.82	18.21	2.82%
05/2016	18.21	18.21	16.77	17.70	-2.80%
06/2016	17.70	18.02	15.70	17.49	-1.19%
07/2016	17.49	18.56	17.25	18.40	5.20%
08/2016	18.40	18.86	17.93	18.43	0.16%
09/2016	18.43	19.60	17.81	18.20	-1.25%
10/2016	18.20	18.20	17.42	17.99	-1.15%
11/2016	17.99	17.99	16.10	16.18	-10.06%
12/2016	16.18	17.81	16.01	17.81	10.07%
01/2017	17.81	17.90	17.21	17.84	0.17%
02/2017	17.84	18.38	17.54	18.35	2.86%
03/2017	18.35	20.49	18.35	20.49	11.66%
04/2017	20.49	21.12	19.95	20.65	0.78%
05/2017	20.65	22.38	20.43	22.38	8.38%
06/2017	22.38	22.38	20.56	20.56	-8.13%
07/2017	20.56	20.90	19.34	19.84	-3.50%
08/2017	19.84	20.43	19.84	20.39	2.77%
09/2017	20.39	20.39	18.67	18.76	-7.99%
10/2017	18.76	18.93	17.91	18.29	-2.51%
11/2017	18.29	18.96	17.90	18.81	2.84%
12/2017	18.81	19.63	18.62	19.27	2.45%
01/2018	19.27	20.70	18.40	18.59	-3.53%
02/2018	18.59	19.16	17.82	18.84	1.34%
03/2018	18.84	19.54	18.34	19.54	3.72%
04/2018	19.54	20.84	19.40	20.84	6.65%
05/2018	20.84	22.37	20.83	20.83	0.05%
06/2018	20.83	22.71	20.83	22.71	9.03%
07/2018	22.71	23.61	22.45	23.21	2.20%
08/2018	23.21	23.36	22.90	23.15	0.26%
09/2018	23.15	23.85	23.15	23.50	1.51%
10/2018	23.50	23.86	21.55	21.67	-7.79%
11/2018	21.67	23.16	21.62	21.85	0.83%
12/2018	21.85	23.36	21.54	21.90	0.23%
01/2019	21.90	24.24	21.90	24.24	10.68%
02/2019	24.24	24.38	23.62	23.92	-1.32%
03/2019	23.92	25.04	23.69	24.96	4.35%
04/2019	24.96	25.49	24.69	25.14	0.72%
05/2019	25.14	26.96	25.14	25.52	1.51%
06/2019	25.52	25.92	24.26	24.26	-4.94%
07/2019	24.26	24.73	22.49	22.87	-5.73%
08/2019	22.87	23.97	22.87	23.81	4.11%
09/2019	23.81	24.31	22.90	24.16	1.47%
10/2019	24.16	24.40	23.55	24.40	0.99%
11/2019	24.40	24.40	23.42	23.71	-2.83%
12/2019	23.71	23.71	22.59	22.80	-3.84%
01/2020	22.80	23.80	22.09	23.80	4.39%
02/2020	23.80	24.68	21.17	21.17	-11.05%
03/2020	21.17	21.55	14.51	15.97	-24.56%
04/2020	15.97	16.43	14.95	16.12	0.94%
05/2020	16.12	16.88	15.52	16.77	4.03%
06/2020	16.77	17.68	16.18	16.48	-1.73%
07/2020	16.48	17.34	15.81	15.81	-4.07%
08/2020	15.81	16.73	15.64	16.26	2.85%
09/2020	16.26	17.71	16.26	17.18	5.66%
10/2020	17.18	18.10	15.82	15.82	-7.92%
11/2020	15.82	19.84	15.82	19.47	23.07%
12/2020	19.47	19.48	18.15	19.16	-1.59%
01/2021	19.16	22.22	18.82	21.50	12.21%
02/2021	21.50	21.50	20.27	20.94	-2.60%
03/2021	20.94	21.50	20.62	20.82	0.57%
04/2021	20.82	21.39	20.70	21.25	2.07%
05/2021	21.25	21.84	21.21	21.49	1.13%
06/2021	21.49	22.40	21.26	21.67	0.84%
07/2021	21.67	22.52	21.67	21.78	0.51%
08/2021	21.78	22.06	21.64	21.81	0.14%
09/2021	21.81	22.01	21.47	21.76	0.23%
10/2021	21.76	23.72	21.59	22.78	4.69%
11/2021	22.78	24.75	22.48	24.53	7.68%
12/2021	24.53	28.91	24.38	28.91	17.86%
01/2022	28.91	29.80	27.18	28.27	-2.21%
02/2022	28.27	28.59	22.50	23.94	-15.32%
03/2022	23.94	27.22	22.83	27.22	13.70%
04/2022	27.22	29.76	26.77	28.74	5.58%
05/2022	28.74	29.12	25.74	28.39	-1.22%
06/2022	28.39	28.60	26.42	27.47	-3.24%
07/2022	27.47	28.99	27.20	28.65	4.30%
08/2022	28.65	29.68	26.80	27.64	-3.53%
09/2022	27.64	27.70	23.77	23.77	-14.00%
10/2022	23.77	25.92	22.38	25.92	9.05%
11/2022	25.92	27.25	25.05	26.60	2.62%
12/2022	26.60	26.93	24.72	24.72	-7.07%
01/2023	24.72	26.16	24.26	25.98	5.10%
02/2023	25.98	26.79	25.89	26.02	0.15%
03/2023	26.02	27.90	25.99	27.75	6.65%
04/2023	27.75	28.68	27.66	28.20	1.62%
05/2023	28.20	28.58	26.10	26.24	-6.95%
06/2023	26.24	27.16	26.24	26.74	1.91%
07/2023	26.74	27.76	25.60	27.76	3.81%
08/2023	27.76	27.84	25.46	26.68	-3.89%
09/2023	26.68	27.64	25.44	25.74	-3.52%
10/2023	25.74	26.80	25.02	26.60	3.34%
11/2023	26.60	27.52	26.22	27.50	3.38%
12/2023	27.50	28.38	26.80	26.90	-2.18%
01/2024	26.90	27.08	24.96	25.08	-6.77%
02/2024	25.08	25.08	21.78	22.22	-11.40%
03/2024	22.22	22.22	19.50	20.06	-9.72%
04/2024	20.06	24.00	19.83	23.50	17.15%
05/2024	23.50	24.88	23.30	24.60	4.68%
06/2024	24.60	24.68	20.18	20.18	-17.97%
07/2024	20.18	22.32	20.18	22.16	9.81%
08/2024	22.16	23.10	21.28	22.42	1.17%
09/2024	22.42	23.26	22.18	23.26	3.75%
10/2024	23.26	23.82	22.66	22.94	-1.38%
11/2024	22.94	23.12	21.26	22.44	-2.18%
12/2024	22.44	23.60	22.44	23.34	4.01%
01/2025	23.34	23.90	23.08	23.16	0.77%
02/2025	23.16	25.72	23.16	25.16	8.64%
03/2025	25.16	26.00	24.32	25.58	1.67%
04/2025	25.58	26.16	23.46	26.14	2.19%
05/2025	26.14	26.72	25.34	25.86	-1.07%
06/2025	25.86	27.44	25.86	27.02	4.49%
07/2025	27.02	27.64	26.70	27.28	0.96%
08/2025	27.28	27.56	25.90	27.34	0.22%
09/2025	27.34	27.34	25.56	26.54	-2.93%
10/2025	26.54	26.90	25.82	26.32	0.83%
11/2025	26.32	27.64	25.88	26.62	1.14%
12/2025	26.62	27.34	24.44	25.64	-3.68%
EOF

set term pdf size 22,13
set term pdf font "sans,20"
set output "Naturgy_Energy_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 "Naturgy Energy Group [ES0116870314] "