Year	% of tax revenue
1999	7.296995875303157
2000	6.484852275807426
2001	7.869060138622143
2002	7.970671028374957
2003	8.960791276318778
2004	9.544479119676959
2005	8.200930808491048
2006	7.35313304436607
2007	8.201104961215256
2008	7.146540176196248
2009	4.375355696188141
2010	5.22021923148784
2011	4.346929765849604
2012	5.047204095037837
2013	5.155139394657785
2014	4.514029323008556
2015	9.806375656405802
2016	4.271496618048805
2017	3.9976808553134076
2018	3.7036783972684666
2019	3.9104953249544674
2020	3.735351891613057
2021	3.5432341109722207
2022	2.665711135132811