Year	% of tax revenue
1998	11.736015992300004
1999	11.015682076898244
2000	9.840380845701484
2001	8.865638766519822
2002	10.102460353716635
2003	10.725984158179976
2004	10.041455550437586
2005	8.481807951987996
2006	7.965060625398851
2007	7.15439163097662
2008	5.826761389558756
2009	5.234807677717927
2010	5.063421323277339
2011	5.37535945507414
2012	5.189551548774849
2013	5.311291827756299
2014	4.803327508376814
2015	4.946074628456181
2016	4.917649619094943
2017	4.752958666457022
2018	4.820554130540775
2019	4.775228885917087
2020	4.07575493105254
2021	5.092244469703593