Year	% of tax revenue
1990	23.72435944229506
1991	20.250415714383337
1992	20.471418696011376
1993	25.894576910824124
1994	26.352037210736633
1995	10.608686160269617
1996	9.678382318418025
1997	12.220800451728362
1998	15.955695863481784
1999	9.528721028032061
2000	9.426776514575137
2001	10.534568781183179
2002	8.29491610794408
2003	6.667267362497434
2004	6.082138812088462
2005	6.5811652620007335
2006	5.977124584921904
2007	5.759071790034562
2008	5.444952552825845
2009	4.375052705203058
2010	4.654161735209909
2011	4.781928800626786
2012	4.879813555117439
2013	4.623468930128436
2014	4.1850650433225205
2015	4.27374488733646
2016	4.396345878279337
2017	3.934947292211822
2018	3.054515383599234
2019	2.713623659905238
2020	3.0669862508843715
2021	3.5050358243643958
2022	3.5409256822143984