Year	% of GDP
1960	74.48275862068967
1961	66.47727272727273
1962	70.10309278350515
1963	69.52789699570815
1964	71.34328358208955
1965	65.39162112932605
1966	64.61538461538461
1967	65.71258199165176
1968	69.95940460081191
1969	68.71856769261719
1970	81.24528301886792
1971	66.57569663889686
1972	69.21356048872828
1973	54.26721600941731
1974	71.61873386163298
1975	70.58399696624953
1976	65.16332529642963
1977	68.54049530583958
1978	66.76235203424386
1979	68.30986791262869
1980	75.79931456335952
1981	67.99367704280156
1982	67.46408171964198
1983	69.13081900852362
1984	69.07479269336324
1985	68.51769061068957
1986	68.54362237477946
1987	70.03777236911478
1988	68.83106121657495
1989	69.79695697766407
1990	70.26605621598618
1991	70.08038110792751
1992	72.20892376617033
1993	72.61619074851194
1994	72.87212389472901
1995	72.85713699225249
1996	72.13727938703607
1997	74.90378193051524
1998	74.56457518297584
1999	75.92446447875861
2000	76.50447064464953
2001	75.88021222521328
2002	73.36502204300292
2003	69.69896189939234
2004	68.77861553048056
2005	69.43534056445584
2006	70.63072843894807
2007	70.02323485668758
2008	69.38086598353144
2009	66.6274191606549
2010	66.95954668232903
2011	66.75996550992234
2012	67.03268108424676
2013	67.00473183938288
2014	67.10309553250634
2015	66.83133791234067