Year	% of tax revenue
1990	0.022686142376167177
1991	0.029453635069461487
1992	0.02052629418284823
1993	0.02094240837696335
1994	0.017563888644945992
1995	0.022740710419793513
1996	0.012463129907357401
2006	0.0025127206482819272
2007	0.0025482369675053455
2008	0.008066783186868254
2009	0.00354203396561134
2010	0.008242069081219007
2011	0.005473704885201114
2012	0.007585990220114556
2013	0.007082040289009641
2014	0.004093423622562951
2017	0.005465796561998919
2018	0.004342212982369556
2019	0.006797229681025506
2020	0.002514653751824106
2021	0.0029860822600747817
2022	0.005487076214476244