Year	% of GDP
1968	4.701733171114965
1969	5.824581561308467
1970	6.35317539423492
1971	8.306594280337599
1972	6.538803860771214
1973	6.771744191932842
1974	9.421513135383114
1975	8.858782191034315
1976	7.171836622501193
1977	6.900389730450479
1978	7.280629587113675
1979	8.643296504305976
1980	7.965138707567164
1981	9.967207873443975
1982	14.109844632691217
1983	13.954250778896524
1984	13.528087515406206
1985	12.348600319455336
1986	8.015808182469096
1987	9.20300322821389
1988	10.538829299110368
1989	10.249787052998514
1990	11.131572731824779
1991	11.158999129519163
1992	11.294649033415086
1993	11.582088578644031
1994	14.37474048668578
1995	11.847039370480902
1996	12.660713443062832
1997	11.513983167510244
1998	14.394015174235875
1999	13.13197677625839
2000	15.361730576450029
2001	14.785586500289677
2002	15.67182537843837
2003	12.696653788153156
2004	12.242162811899563
2005	13.135533224716042
2006	14.929664111620708
2007	14.725316291649515
2008	16.485431897289228
2009	13.699851376312038
2010	12.035177211152185
2011	14.998123284778567
2012	14.570347524275187
2013	16.195823668485037
2014	17.310815844315304