Year	% of tax revenue
1999	5.026768288004096
2000	2.743638504548316
2001	4.45023135456779
2002	7.491654173560517
2003	7.5065818085013145
2004	6.971674276354638
2005	6.014303678652533
2006	4.434769154053999
2007	5.5033411537460974
2008	6.120256098777603
2009	10.380544108743628
2010	7.972811250948399
2011	6.264894944441488
2012	6.14352646420944
2013	6.647076423320225
2014	9.38443573804507
2015	8.499981700416253
2016	5.550313978932983
2017	6.435970604930064
2018	5.838090708874009
2019	5.529388540993397