Year	% of tax revenue
1973	34.21725239616614
1974	32.196452933151434
1975	28.454545454545453
1976	27.522451135763337
1977	32.53798117252307
1978	37.19693555655701
1979	36.88427064329341
1980	39.98751170777396
1981	39.331519626894675
1982	35.292310842633356
1983	40.59511594500308
1984	41.456452706318906
1985	45.462746408286
1986	49.14199240499101
1987	47.615074398553745
1988	47.75700765458461
1989	45.68488438182416
1990	47.78995186289313
1991	46.81087871641726
1992	43.28484015984016
1993	44.944122020240776
1994	45.907266175350294
1995	43.98084754896331
1996	41.66411486509476
1997	39.49525605933826
1998	38.48125
1999	32.59837362877258
2000	33.416855394400805
2001	31.202575191665026
2002	27.073934894660923
2003	24.970522028084467
2004	25.137508509189928
2005	23.40618149668762
2006	20.142148917647123
2007	16.33999813233448
2008	13.78021978021978
2009	2.847004784834181
2010	2.7489139609034936
2011	2.6209697739344278
2012	2.3062703783851664
2013	2.0313845551028047
2014	1.7109375971181882
2015	1.4376546156850831
2016	1.7089170362204518
2017	1.3879225384236797
2018	1.460326685334239
2019	1.3879072747943613
2020	1.3086248099013469
2021	1.3493239658232248
2022	1.4044899935946507