Year	% of GDP
1975	3.3742334472937334
1976	3.9164238715336035
1977	3.501299437298289
1978	3.208165467481479
1979	2.5133367853109028
1980	2.8437253160934906
1981	3.2651877084443535
1982	3.727081511980986
1983	4.887145229187409
1984	4.3114286142343445
1985	4.396997048538459
1986	4.1419499574752825
1987	2.6929066180975183
1988	2.560394082558308
1989	1.7654174744583968
1990	2.698734141824628
1991	2.911399329061356
1992	3.6149126411817303
1993	3.9771104435687046