Year	% of tax revenue
1990	3.3200914356732287
1991	1.2852089024226412
1992	2.3787501005388885
1993	1.6818863800544575
1994	1.7825746366089301
1995	1.849474248752661
1996	2.0536052531885343
2004	0.8303213645910699
2005	1.0539747469861758
2006	0.6999712145425752
2007	0.7910063012467053
2008	0.7830649312696364
2009	0.7741295441878746
2010	0.7220234160257802
2011	0.48640822340984996
2012	0.4435953463234164
2013	0.24612586081110333
2014	0.4807873275290588
2015	0.41976838760473983
2016	0.4312311851515621
2017	0.3533564421350433
2018	0.3134304775298151
2019	0.3064836942734005
2020	0.45281430708684056
2021	0.5347253663040956