Year	% of GDP
1977	0
1978	-0.09349043830871759
1979	0.12872129973882973
1980	0.04123668098309803
1981	0.012589621502235405
1982	0.014953726262203964
1983	0.010718607220710689
1984	0
1985	0.025639923013728593
1986	0.04002215003997794
1987	0.6872541531953005
1988	0.9334472398557394
1989	0.875026011690617
1990	0.0034422989005625745
1991	0.5595278809734654
1992	0.7319673512623742
1993	0.7469747389756679
1994	0.047629837224263935
1995	-0.1697315327913535
1996	0.07868744544845434
1997	0.06122537590247614
1998	-0.01738972667394174
1999	-0.13990942591549416