Year	% of GDP
1980	0
1981	0
1982	0
1983	0
1984	0
1985	0
1986	2.65653583764257
1987	7.0779094484789
1988	8.67006887175373
1989	8.573806847441
1990	10.0625290036572
2018	15.9905930685931