Year	% of GDP
1974	18.057225294541958
1975	26.613363792118793
1976	24.930448222565687
1977	25.509533201840895
1978	28.806626444421717
1979	31.472612990122716
1980	34.51579649505791
1981	25.125208681135224
1982	21.420027749868428
1983	17.52148384337209
1984	16.690977933645758
1985	13.838138569980435
1986	12.627536398028202
1987	13.823306561600242
1988	16.93101451672939
1989	21.255160093666262
1990	23.772926754911484
1991	21.536869177931813
1992	17.992318156357527
1993	14.954056449680838
1994	13.66073146415266
1995	15.063557060285799
1996	12.136376893434027
1997	13.463427143465118
1998	14.890263781861293
1999	13.607292972785414
2000	14.527833557392425
2001	14.385375118116128
2002	15.268189214318923
2003	16.567711217742044
2004	18.540095305079657
2005	17.884944480690365
2006	19.76706959923725
2007	19.29025565421124
2008	15.641150445718942
2009	17.96391900244794
2010	20.76785884383561
2011	22.921626793558428
2012	29.66667046927735
2013	27.5442235624802