Year	% of tax revenue
2001	6.677185802453916
2002	7.428958521503509
2003	6.743359212670101
2004	6.729083557220006
2005	5.548108710549502
2006	5.234009805039334
2007	5.629585519589227
2008	4.194670474023687
2009	5.612141403834451
2010	5.137507282653259
2011	5.185963115979646
2012	5.3216858814429555
2013	5.796611232572309
2014	6.0503398425769666
2015	7.124906319669205
2016	7.925946580917688
2017	10.143713823500725
2018	8.499643787118472
2019	8.658231849588296