Year	% of tax revenue
1972	15.979381443298967
1973	15.547024952015356
1974	15.46707503828484
1975	15.17386722866175
1976	18.147871545929796
1977	16.875
1978	18.147013782542114
1979	12.703502713369511
1980	6.800000000000001
1981	5.843832891246684
1983	7.71850170261067
1984	10.067763794772508
1985	9.101411421969964
1986	7.765395581136031
1987	8.528883353356774
1988	8.10607868180606
1989	7.66968688531642
1990	7.342531123985278
1991	5.808784492634713
1992	5.50998963306699
1993	5.758671285301547
1994	4.051471113393577
1995	4.772886267548189
1996	2.8186114043174824
1997	2.6744136727205476
1998	2.000355913633899
2008	1.6374367302099138
2009	1.4048472236893108
2010	1.524318330320828
2011	1.8477777695829103
2012	1.8745243828413483
2013	2.0442341087999485
2014	1.8790853121936821
2015	2.038444876062734
2016	2.049122485078729
2017	2.4182380739401617
2018	2.5629195822319644
2019	2.5647662645244975
2020	3.0070491441887692
2021	2.8429529484350033
2022	3.388891246417275