Year	Total	Agricultural	Other sources
2010	3.6	3.3	0.3
2011	3.5	3.3	0.2
2012	3.5	3.3	0.2
2013	3.5	3.3	0.2
2014	3.5	3.3	0.2
2015	3.6	3.3	0.2
2016	3.6	3.3	0.2
2017	3.6	3.4	0.2
2018	3.6	3.3	0.2
2019	3.5	3.3	0.2
2020	3.4	3.2	0.2