Year	% of tax revenue
2001	23.30462863293864
2002	21.061843640606767
2003	24.64428002276608
2004	20.270176843798744
2005	17.412182356611165
2006	20.06269592476489
2007	17.415275809946287
2008	17.215931901337886
2009	16.17230201482734
2010	16.055491833003778
2011	15.35692605570752
2012	16.449203754699575
2013	18.600029970069826
2014	17.725315471112772
2015	16.00915388164937
2016	14.358194905222843
2017	13.610006340809843
2018	15.25733896720455
2019	16.22550975306502
2020	17.196933186652867
2021	18.772797685593087