Year	% of tax revenue
1995	0.5058915284247802
1996	0.4860640180029323
1997	0.3466944884596859
1998	0.04895874884064317
1999	0.0013554794759477143
2000	0.00172060622345009
2001	0.0002447253528939589
2002	0.0003234845235299408