Year	% of GDP
1972	37.43169398907104
1973	37.21713110155227
1974	32.67768247253298
1977	4.615802221119091
1978	7.597964495931336
1979	2.178426333472509
1980	2.699909502650575
1981	3.7361503697171297
1982	3.444779017265071
1983	3.2382993300123064
1984	3.128614103801719
1985	1.9380025240544874
1986	2.0950217689099113
1987	1.2673803162232604
1988	1.2298205714304125
1989	1.1759929111147318
1990	1.5450708471510401
1991	0.2556073952203781
1992	0.0858148101636521
1993	1.092624065595506
1994	1.422764285478223
1995	1.14618124453099
1996	0.9650974112057354
1997	1.1730587506924306
1998	1.492442926705875