Year	% of GDP
1977	14.5617788233647
1978	19.7348008693331
1979	17.1096048530755
1980	18.3998167375603
1981	13.1113788250175
1982	18.6598782049653
1983	23.2727721073308
1984	20.1958563521022
1985	23.2286858302742
1986	23.3639674928697
1987	21.2401131929106
1988	28.0769420449852
1989	22.2447928557678
1990	31.770218272084
1991	29.5591915705878
1992	32.7061253858517
1993	37.415908579157
1994	36.7927010835968
1995	19.0018014556022
1996	19.4705971422596
1997	19.8642672294394
1998	19.0846540572335
1999	18.6978068948743
2000	17.8561996963888
2001	16.7771320759584
2002	15.2711382003672
2003	18.978131479306
2004	19.8713682108251
2005	26.0418320863153
2006	18.3748151318263
2007	13.5053441986035
2008	15.1903537471911
2009	26.1762012185032
2010	23.3868348484193
2011	19.6315574697359
2012	24.0025363483461
2013	23.1566303334326
2014	22.4477770064428
2015	25.7016020745111
2016	15.5906111293722