Year	% of GDP
1960	11.0909077600002
1961	13.4105958044603
1962	12.9508180585866
1963	13.1861195410443
1964	9.6839066267838
1965	11.7073170731707
1966	14.5876288659794
1967	17.4193548387097
1968	18.7067476234995
1969	21.1690083671794
1970	20.8017511443292
1971	18.658472586607
1972	20.8315855956897
1973	20.3627253225392
1974	31.8905441330426
1975	25.7645357267474
1976	20.2894281839564
1977	20.3336772763527
1978	22.8851287037458
1979	19.2578697460309
1980	23.7533552659456
1981	24.7845772865845
1982	20.3913925937979
1983	21.7500970577752
1984	18.8893601722161
1985	14.5674917248555
1986	14.5740246210804
1987	13.9964563580554
1988	12.8669561616784
1989	13.0326648612671
1990	13.1694943340429
1991	15.7486353704766
1992	13.517230676196
1993	13.9048834171493
1994	13.9983833288191
1995	11.3755848727874
1996	11.7975784520249
1997	10.8486455179772
1998	11.575778496994
1999	12.2739313360534
2000	12.0428035934708
2001	14.3320662495832
2002	13.8658451737904
2003	15.0030381242778
2004	17.1685789911614
2005	17.7291130340111
2006	18.2381339586991
2007	17.9170758628149
2008	18.1845994646031
2009	19.2469010856999
2010	21.0211462238078
2011	22.9395872211236
2012	22.8506485450166
2013	33.1427388005875
2014	30.4243442324416
2015	30.5877430216892
2016	28.9934191461801
2017	25.3426552143116
2018	28.0552549773111