Year	% of GDP
1975	2.786649493154744
1976	2.905670502467524
1977	3.3286029826391466
1978	3.8586026909177242
1979	2.8651806619222224
1980	2.917532730091708
1981	4.321493411814717
1982	3.8933762129605474
1983	3.4841751697498684
1984	4.710854509600446
1985	5.14182449455036
1986	3.7856425107163574
1987	3.492181426680132
1988	3.287336364295762
1989	1.7752780471816088
1990	3.199370092101807