Year	% of tax revenue
1972	2.1636240703177823
1973	2.1477098400175323
1974	2.038776733959624
1975	3.191114245416079
1976	2.4542318917484747
1977	2.436428149024246
1978	2.001851423281648
1979	1.9912251096861289
1980	2.1841192080016327
1981	2.241662110442865
1982	1.1560693641618496
1983	1.2246403541128734
1984	1.032540675844806
1985	0.9632842445027234
1986	0.881765479612218
1987	0.8590035558751848
1988	1.0005093502146547
1989	0.9595132225602621
1990	0.9520398722654968
1991	0.9105960264900662
1992	1.6875704622322436
1993	1.9450845604030778
1994	1.8401863093192836