Year	% of tax revenue
1990	58.620689655172406
1991	55.613126079447326
1992	52.70142180094787
1993	51.04869259909452
1994	51.24279835390947
2000	26.382978723404253
2001	23.12435765673176
2002	9.372743500364706
2003	10.700198505157097
2004	10.143383098601234
2005	10.624920772475038
2006	9.668980875713396
2007	10.906018310749918
2008	46.52833971958646
2009	42.66536761579954
2010	45.664029155826626
2011	25.578502309035994
2012	25.425545132767034
2013	25.670848528626728
2014	26.477710627724317
2015	28.224328531735864
2016	29.763097767266604
2017	29.05238162316624
2020	23.565459610027855