Year	% of tax revenue
1997	60.17795296379773
1998	58.85914266332028
1999	38.96604234156135
2000	34.42697064617173
2001	27.10099987343374
2002	14.29531490015361
2003	10.212016411402058
2004	10.056969236612229
2005	9.78455570603001
2006	9.254759930285896
2007	10.021685373109458
2008	9.513754685628593
2009	8.540449694764382
2010	8.295035484241064
2011	7.87860865895548
2012	7.896000872609002
2013	8.213870756490694
2014	7.486519463370928
2015	7.038473541873317
2016	6.772945499847152
2017	6.044880955117262
2018	5.874766811786191
2019	5.118671897505824
2020	3.1507767402637277
2021	3.1285364029491967