Year	% of tax revenue
1982	0.261437908496732
1983	0.6666666666666667
1984	0.7936507936507936
1985	1.398086828550405
1986	1.6326530612244898
1988	1.1869436201780417
1989	2.5376344086021505
1990	1.3379369874838154
1991	2.3082386363636362
1992	3.19926873857404
1993	2.5721315142026393
1994	4.490363600238426
1995	4.601415820252385
1996	2.262497038616442
1997	2.520428127517551
1998	2.3886584455908664
1999	3.491862853531363
2000	2.928531687825603
2001	4.084720121028744
2002	3.914539457663171
2003	4.243834667374225
2004	6.266663451316257
2005	7.656412619640779
2006	4.279022612845072
2007	3.89069484222774
2008	2.8103510621811254
2009	3.147460542666343
2010	1.886491152819623
2011	2.4697353273461777
2012	2.6685018367000795
2013	1.8924603424622668
2014	1.934714631708647
2015	2.5997198789961913
2016	3.1361073543678883
2017	2.811018478090652
2018	2.670828321865878
2019	2.337226700130315
2020	2.0919588074578273