Year	% of GDP
1970	4.16286993026733
1971	4.1799201965332
1972	4.83728981018066
1974	3.94795989990234
1975	5.19851016998291
1977	5.25665998458862
1980	4.40072011947632
1981	5.18743991851807
1982	5.00895023345947
1983	6.0598201751709
1984	4.06372976303101
1987	3.92751002311707
1988	3.62941002845764
1990	2.44671010971069
1992	4.31067991256714
1993	3.81783008575439
1994	5.00603008270264
2006	3.66905999183655
2007	3.62732005119324
2009	6.87468004226685