Year	% of GDP
1970	39.1977931599725
1971	42.9580348987527
1972	39.991521962226
1973	45.7133956033076
1974	57.2288999185885
1975	56.449476703093
1976	56.3647323561238
1977	59.2919131433536
1978	55.8082126570611
1979	57.9450325791504
1980	61.4672486935035
1981	50.0116988112659
1982	47.0918422038783
1983	37.3825296312575
1984	36.965275229877
1985	36.4552825444639
1986	31.0891221918897
1987	35.7110916745134
1988	32.5885113770575
1989	40.0608392008653
1990	33.2774976542588
1991	32.5590337277222
1992	33.4743953444317
1993	32.1044214831732
1994	33.1482673543954
1995	39.304637751628
1996	38.1091915986528
1997	60.4228557410622
1998	61.2578812286823
1999	60.3640990948552
2000	72.8269530190905
2001	73.3711005368819
2002	66.8938787230676
2003	75.4025311307894
2004	66.0372146788672
2005	67.9460007357452
2006	64.9025039877809
2007	63.135560304429
2008	67.0374136759867
2009	62.5766950865355
2010	64.0449654812627
2011	67.3154176140257
2012	63.4072044771776
2013	58.615639867544
2014	57.247716267576
2015	50.8232885417407
2016	48.7923125375973
2017	50.1786940259983