Year	% of GDP
1960	56.6511729526496
1961	57.4789974764631
1962	60.6825504358254
1963	62.8909649953651
1964	63.894727364172
1965	65.2696916727576
1966	64.2621003956806
1967	66.9447151255658
1968	67.4489296960007
1969	66.0931152068847
1970	70.4391139888805
1971	73.2355513201435
1972	78.6633123893792
1973	81.2352450233819
1974	80.3177235867746
1975	80.5715268698389
1976	81.4733172403553
1977	83.818252888772
1978	87.8153949685301
1981	88.1703150321516
1982	90.7907144829314
1983	94.0815755467572
1984	96.4818047794732
1985	98.3832888913214
1986	109.784155788188
1987	117.508905800772
1988	121.464965912712
1989	120.703427077262
1990	117.34893618734
1991	117.461810523436
1992	118.644111810142
1993	122.51010779915
1994	125.223883252669
1995	128.339151232333
1996	123.005946164008
1997	111.028327102983
1998	112.837770615202
1999	116.882364083206
2000	118.456696678998
2001	120.112141503852
2002	119.432037659456
2003	121.316460313411
2004	121.515077186102
2005	123.045957105339
2006	125.536537245494
2007	130.50407586595
2008	138.48610624695
2009	143.682133545835
2010	145.361037763609
2011	147.501646594215
2012	146.725265008049
2013	142.131298656946
2014	142.531064089391
2015	138.899640373355
2016	143.281452206415
2017	141.091134286131
2018	138.67312397689