Year	% of GDP
1960	2.42048087283881
1961	3.06793294108671
1962	4.91814533308481
1963	5.52496866118597
1964	8.75266832565698
1965	9.95462135593537
1966	9.5789817232376
1967	9.56060387675234
1968	10.361328125
1969	10.9069662766563
1970	12.2082299546102
1971	10.2595473598057
1972	10.0860897112546
1973	20.5011974779397
1974	25.4084941529938
1975	10.8093419911596
1976	6.30616108749617
1977	5.4531976744186
1978	4.91889908256881
1979	5.00489705063996
1980	2.45718240009227
1981	2.60532281465361
1982	5.57782281611762
1983	6.52737054854963
1984	5.98686007100059
1985	4.61106655974338
1986	3.44752106818431
1987	10.9741285788406
1988	10.3078492718095
1989	14.8403648909451