Year	% of tax revenue
2002	8.896619198737612
2003	11.88595850592327
2004	8.329099727077823
2005	4.756429024718356
2006	4.777523064219982
2007	4.1529320050747005
2008	2.6099452835000743
2009	2.776153567495348
2010	2.526384164195777
2011	3.5563700260862094
2012	2.6922054176437333
2013	2.9414183925823645
2014	2.285215605924858
2015	1.6833734766704551
2016	0.26039221790464295
2017	0.32088872496181503
2018	0.3032371049632646
2019	0.22470408547684695
2020	0.12570399894607995
2021	0.24065961130426342