Year	% of central government expense
1972	8.176998873769723
1973	6.544290947665468
1974	15.19973784912205
1975	21.044044604015735
1976	37.65166207747069
1977	55.381686525502246
1978	20.800196813451695
1979	10.314819197184184
1980	9.976837887127843
1981	8.156747349602846
1982	5.345714420646925
1983	2.814337134411053
1984	2.7696609893107147
1985	5.575770016148995
1986	4.478791358850371
1987	4.074424615768516
1988	3.7297159651161196
1989	3.2492434747047634
1990	1.3637229261616677
1991	1.326439027966852
1992	0.7467834607570066
1993	1.021974382986036
1994	1.1632222864713229
1995	0.46192254061301924
1996	0.4632220529356887