Year	% of tax revenue
1994	8.353329114902131
1995	8.555744654193118
1996	19.64531439933188
1997	8.932601336047037
1998	12.83681745953881
1999	11.77447593180623
2008	3.603398573812775
2009	4.0878499462387
2010	4.2167041140466415
2011	3.6297099059196785
2012	3.2806804374240586
2013	3.819194823867721
2014	4.354150273028591
2015	4.550383028874484
2016	6.803711115153719
2017	7.571846683874591
2018	8.435885394011388
2019	9.472120363770642
2020	9.138584934763278
2021	9.576228505647888