Year	% of tax revenue
1990	34.52584389356178
1991	31.991402086785186
1992	28.201158207994855
1993	23.91501657806509
1994	23.593002001914876
1995	24.381206221254327
1996	22.774340194468998
2004	19.723397824899344
2005	19.19450164222901
2006	16.860243738647547
2007	19.2981658590245
2008	17.720842005785116
2009	18.29167688670131
2010	18.238293965801468
2011	15.22421058894919
2012	15.52459146659115
2013	16.9536506442027
2014	17.318584203865512
2015	16.62616839997671
2016	16.176124450637634
2017	15.190631331101754
2018	15.680329994837361
2019	15.614991835230596
2020	16.30176876262461
2021	19.401846744636398