Year	% of tax revenue
1972	43.15292408281874
1973	42.55791812123135
1974	39.132495852097655
1975	30.822391154111955
1976	35.54665140240412
1977	35.732916014606154
1978	39.356159285448456
1979	36.46554566435872
1980	32.60152102166739
1981	24.97276688453159
1982	26.4251061249242
1983	30.276994101051553
1984	30.150081254182197
1985	33.081422093710984
1986	29.366899302093717
1987	42.446014607812
1988	43.012123419532756
1989	42.40600358081597
1990	43.57838795394154
1991	46.96010065468199
1992	48.678761898118495
1993	47.038763090081694
1994	40.973802783614794
1995	38.67074156350612
1996	38.531175133860145
1997	37.97129994372538
1998	38.453450609302465
1999	41.73510671203216
2000	46.10455029993938
2001	32.85913404372884
2002	33.79187555938452
2003	16.184584233057596
2004	13.662593132362941
2005	9.714736198700473
2006	9.890999759892553
2007	8.947426352342314
2008	9.00178426984825
2009	8.33941574663345
2010	8.051163054649647
2011	6.935268143598446
2012	6.087322997033596
2013	5.392284002764343
2014	5.4464226924661645
2015	6.13858385774724
2016	6.060352868824774
2017	5.7925181062069
2018	5.817464506553447
2019	5.351489090420615
2020	5.3660804010760375
2021	5.499245460352847
2022	5.852197495288366