Year	% of GDP
1972	2.7098161976880433
1973	2.008035219506188
1974	1.676430884631498
1975	3.0107827220408616
1976	5.079059142663382
1977	6.767495745990369
1978	6.638730231623661
1979	7.01683967190328
1980	1.4072558981271148
1981	-0.9142140142953812
1982	-2.25734248438756
1983	-0.20393322021007126
1984	2.824954687789988
1985	5.244113641132144
1986	8.197115715090941
1987	-4.653521801176296
1988	-0.17061094680793393
1989	1.0047471480421541
1990	-1.4542695246185626
1991	-0.3738828761895842
1992	4.494442825113486
1993	9.886941913792478
1994	0.26592602664609993