Year	River nitrate 1992-2019 (901) (secondary axis)	River nitrate 2000-2019 (1328) (secondary axis)	Groundwater nitrate 1992-2019 (462)	Groundwater nitrate 2000-2019 (1013)
1992	2.27		19.34
1993	2.2		19.38
1994	2.14		19.55
1995	2.09		20.03
1996	2.16		19.92
1997	2.22		20.64
1998	2.25		20.47
1999	2.09		20.25
2000	2.14	1.96	20.65	20.56
2001	2.15	1.96	20.3	20.45
2002	2.1	1.93	19.79	19.96
2003	2.02	1.87	20.19	20.27
2004	2.2	2.02	20.16	20.04
2005	2.08	1.93	19.9	20.34
2006	2.19	2.03	19.67	20.37
2007	2.12	1.96	20.02	20.45
2008	2.05	1.88	20.04	20.35
2009	1.95	1.8	19.96	20.04
2010	2.02	1.87	19.75	20.26
2011	1.89	1.74	19.59	19.87
2012	1.88	1.74	19.48	19.82
2013	2.03	1.87	20.12	20.42
2014	1.93	1.8	20.15	20.56
2015	1.89	1.76	20.27	20.83
2016	2.05	1.85	20.28	21.2
2017	2.03	1.84	19.93	20.59
2018	1.94	1.78	21.44	21.14
2019	2.07	1.87	20.39	20.19