Year	% of tax revenue
1972	2.2470475582508778
1973	1.5276855262363382
1980	0.08614451604010889
1981	0.17345138082381864
1982	0.2609596496059378
1983	0.10550775607611632
1984	0.022102018263246672
1986	0.0477474161684688
2021	0.7514534233154463
2022	0.8023840598879586