Year	% of GDP
1979	2.31784009933472
1980	2.54417991638184
1981	3.35154008865356
1983	4.14548015594482
1984	5.79150009155273
1985	7.41926002502441
1987	11.6447601318359
1988	12.3372898101807
1989	12.2842302322388
1990	12.4542598724365
1992	22.3222103118896
1994	44.3339805603027
2010	1.54405999183655
2011	5.07800006866455
2012	6.07020998001099
2013	5.99597978591919
2014	6.13835000991821
2015	5.81300020217896
2016	5.47300004959106
2017	5.81877994537354
2018	2.05048990249634