Year	% of tax revenue
1985	47.942609637249596
1986	50.06093102607848
1987	61.981093300452116
1988	74.34545454545454
1989	69.00963512873165
1993	74.2254980997351
1994	72.85677944543373
1995	72.92165071770334
1996	68.68596881959911
1997	68.92529488859765
1998	67.94280987829376
1999	63.72668064907826
2000	63.07977736549165
2005	20.318139995378477
2006	16.277686504029358
2007	16.467280347601402
2008	19.207566725588727
2009	15.014717667278326
2010	21.33558694754645
2011	27.69828538505692
2012	25.66144581191054
2013	9.5863920600818
2014	7.399840017391036
2015	6.094068958178791
2016	6.061057087016908
2017	4.335748999525329
2018	4.442559847870376
2019	4.27099584771337
2020	4.093152513408823