Year	% of GDP
1964	12.383435239942683
1965	14.392380143947998
1966	14.031593679439466
1967	13.5403504816917
1968	14.913151355301064
1969	16.17636311887175
1970	14.795479282059077
1971	14.451225550661524
1972	16.376186392225996
1973	16.680359139666045
1974	11.502690899079953
1975	14.784021616426779
1976	15.387310723443896
1978	19.58617283807822
1981	19.801246732505987
1982	25.410517310956525
1983	29.487480844026777
1984	31.537584555504704
1985	34.63805255681857
1986	39.49250704281996
1991	21.379683037185444
1992	20.24249541388061
1993	21.22846548922086
1994	23.054410329156717
1995	25.564260348575843
1996	25.694680181412732
1997	27.679745539697155
1998	33.86258717582629
1999	34.05890788455737
2000	31.799761411500395
2001	33.90302319682624
2002	34.60677989216625
2003	33.183748652614206
2004	31.933809115846174
2005	31.941542621104976
2006	31.0762166963569
2007	32.93902324898365
2008	32.52368323117765
2009	38.04621887988502
2010	37.10558117961203
2011	34.635240724532814
2012	34.2369221846975
2013	36.246217516847
2014	39.45501154096877
2015	48.03155845587005
2016	55.72726586581959
2017	53.682019315046155