Year	% of tax revenue
1990	34.74194456735991
1991	39.57925267440108
1992	46.93690543652564
1993	41.565842431105146
1994	37.21328037104218
1995	32.643007118348955
1996	31.567337207010166
1997	28.56632105827672
1998	30.061277282160738
1999	27.791051052199013
2000	24.39015829560212
2001	20.35633469889045
2002	18.50719878757262
2003	15.904534823679494
2004	15.712136128271807
2005	13.991372980910427
2006	12.041215718738197
2007	10.420005341880342
2008	10.311446285486385
2009	9.385742560505573
2010	9.216651595833753
2011	8.954346548233296
2012	8.145849495733126
2013	8.542328332055634
2014	8.107103933419202
2015	8.124801640584947
2016	7.310078977059045
2017	7.006193447378721
2018	6.460147723514496
2019	5.909246282686721
2020	5.533931632550167
2022	3.847680148153047