Year	% of GDP
1960	57.7449604342843
1961	58.2676318528463
1962	61.5260818800206
1963	63.7934682274994
1964	64.8618497136415
1965	66.0859488087909
1966	65.0265272448526
1967	67.7771042545596
1968	68.1059784622587
1969	66.6489986566572
1970	70.9244182142738
1971	73.5809063056155
1972	79.0672374512654
1973	81.6044395435786
1974	79.5149221178117
1976	79.4543516659828
1977	81.6615418225531
1978	86.3585765236557
1981	85.3807229625824
1982	87.5365131402627
1983	91.6948225815902
1984	94.8153785801108
1985	97.2916316361604
1986	109.178583710089
1987	117.348701592689
1988	121.929997769605
1989	121.388157529363
1990	118.497775043845
1991	118.576359452549
1992	119.783809896902
1993	124.743815094909
1994	127.050340043721
1995	129.160022426759
1996	124.161862745899
1997	112.413565594576
1998	115.094462709379
1999	118.917887454617
2000	120.547359788049
2001	121.744547530138
2002	121.086562961257
2003	122.781366438653
2004	122.936411646075
2005	124.359712481591
2006	126.68069981484
2007	131.644657936353
2008	139.168726307979
2009	144.64950956252
2010	146.300321849559
2011	147.919893023521
2012	146.812467407496
2013	142.53873363122
2014	143.331283635971
2015	140.3522672023
2016	144.996558732234
2017	142.961308951776
2018	141.707326649764