Year	% of GDP
1968	6.449784077067877
1969	7.090724456063782
1970	6.465353195579048
1971	6.316655291296967
1972	5.907450164222302
1973	6.015043752474301
1974	4.86875634834364
1975	5.546071906382834
1976	5.145369493131217
1977	5.5593233401410345
1978	5.708210102922039
1979	5.352248275463687
1980	5.297461457665391
1981	5.424812768225296
1982	5.712848647980554
1983	6.117999807223607
1984	4.9532461101906335
1985	5.606757312137297
1986	6.42009354582846
1987	5.915732006932588
1988	6.413820033139314
1989	5.897258999669615
1990	5.212136740812044
1991	5.291859204896672
1992	5.137632177114126
1993	5.175343235844129
1994	4.8799401325991
1995	5.040472213084532
1996	4.0896192166217435
1997	4.495492005357442
1998	4.950432154924942
1999	4.351061427661489
2000	3.9329857306368012
2001	4.231512485452344
2002	3.8470461924177677
2003	4.313146439606158
2004	3.718817183587738
2005	3.6951832324594545
2006	3.6568046342888962
2007	3.813539388618934
2008	4.158416115705053
2009	5.662177794741398
2010	5.375265165505536
2011	5.0129300643109405
2012	5.01636863410636
2013	4.9025500732404845
2014	5.026753566184823