Year	% of tax revenue
1990	20.80737754977403
1991	21.539754580601784
1992	28.16209972405827
1993	27.751307766634458
1994	23.914385676065034
1995	27.144617280147855
1998	33.535547370701664
1999	31.605377791284965
2012	16.40965032807758
2013	14.505282330373062
2014	15.476621964479884
2015	13.94007717989854
2016	14.223307208017474
2017	15.112682280159081
2018	13.47707569749026
2019	12.930632189379054
2020	12.414168424841515
2021	12.701723756297223