Year	% of GDP
1972	-0.3402396007429202
1973	-1.0321173271581816
1974	-0.4777476239633112
1975	0.7055980031001093
1976	0.7507882098570853
1977	1.1275343403439768
1978	3.1189341242377395
1979	1.971773978554844
1980	1.7784735130181477
1981	1.2158908598578244
1982	2.1363870667271803
1983	2.6204518614375107
1984	1.6670928213983298
1985	1.0121017808354296
1986	1.1157443193872107
1987	1.8128709245120354
1988	0.0626953416420007
1989	-0.7881575531866923
1990	0.22022210052403832
1991	5.117500734840228
1992	14.028819541300159
1993	16.72518920082256
1994	13.495955663343068