Year	% of tax revenue
1990	22.199725798304705
1991	19.10672338264237
1992	25.56301689719093
1993	22.571764691831337
1994	23.880638379583257
1995	24.567820616444507
1996	18.438113948919447
1997	16.38747579262179
1998	14.472039376046927
1999	13.08556696717752
2000	11.981674142095066
2001	12.395091142310275
2002	11.721060564467258
2003	11.73343780730655
2004	11.03170577390887
2005	15.957922123449746
2006	9.553567496954308
2007	8.407303922500365
2008	7.276651876723827
2009	6.719591812962161
2010	6.811716508869205
2011	6.298535145232593
2012	5.401151909237225
2013	4.250752251597972
2014	4.210072213191906
2015	4.348973137147254
2016	4.407248070979894
2017	4.352136471476975
2018	4.393484470063547
2019	4.351232543769128
2020	4.1311550769929335
2021	4.486999560365254
2022	4.43260125821672