Year	% of tax revenue
1990	12.374531698812346
1991	11.317157766557209
1992	6.745474303586101
1993	7.021086041103638
2001	4.582682246708715
2002	4.315433641057416
2003	6.482491670176146
2004	5.6730306739760445
2005	3.059572423550793
2006	5.211827213524116
2007	1.0432969825542473
2008	0.9538325281063631
2009	0.3630744895514379
2010	1.5355868618566197
2011	0.05622925154464455
2012	0.8913434488893136
2013	0.7527828300667733
2014	1.784052306012938
2015	1.7272284995015073
2016	1.1058056897517587