Year	% of tax revenue
1972	40.30019824412349
1973	37.299253562542376
1974	31.277533039647647
1975	22.958442313281044
1976	27.378304917222607
1977	38.92461593426228
1978	33.250945042163494
1979	28.793469752879407
1980	29.298230009783914
1981	31.25879334602341
1982	32.40613866812821
1983	31.45271813613522
1984	30.31749710312871
1985	28.72045639771801
1986	26.39787560309695
1987	26.963161696419252
1988	26.586363898334376
1989	25.46705286024614
1990	24.052171271077988
1991	24.772662218992945
1992	21.973670127368035
1993	15.978718061397473
1994	12.828683160625229
1995	12.193571176262804
1996	11.470113085621971
1997	9.335100816298054
1998	6.026274557068821
1999	5.599476582520038
2000	5.418898066624308
2001	5.37572492082425
2002	5.075823053351143
2003	4.0065065949998235
2004	1.431546930274077
2005	0.043679566698698345
2006	0.03856140260675082
2007	0.006027364233620638
2008	0.021471793870778837
2009	0.016121974250903982
2010	0.02674631123790844
2011	0.0413304039503165
2012	0.030774641695243122
2013	0.0565597530224118
2014	0.002314279102059708
2015	0.09038029246135663
2016	-0.0290743184308814
2017	0.0992063492063492
2018	0.08657927034454124
2019	0.27591059755939484
2021	0.2624535957869291
2022	0.03205154354406155