Year	% of tax revenue
1990	1.7942954287873063
1995	17.168295751475853
2001	16.73622349033302
2002	20.36010223566469
2003	23.939164776069237
2004	25.455131303367168
2005	20.99584398976982
2006	19.37200404591231
2007	17.443127639286203
2008	14.133410083220557
2009	13.814861731876956
2010	13.310073743472401
2011	17.383998472407868
2012	12.234342531106629
2013	13.953290624735667
2014	14.169929406828205
2015	16.008709451991813
2016	16.25401656694577
2017	16.790505645710812
2018	12.995792926357966
2019	14.351259012632541
2020	12.562771787331847
2021	11.995118647865883
2022	10.704966541556242