Year	% of GDP
1977	45.5875553889446
1978	44.9531600861747
1979	55.640122988145
1980	59.8467960760566
1981	68.0522246927155
1982	62.9805304858055
1983	54.4581512164101
1984	48.8878785111228
1985	52.5319994236098
1986	56.4036871276655
1987	53.5290558419555
1988	50.7235339963964
1989	48.116845890072
1990	49.9103262888247
1991	49.5809167531457
1992	44.6949082028274
1993	51.4242260753199
1994	49.8028085835768
1995	49.4509050989873
1996	52.8990293247669
1997	54.2064487542244
1998	56.7802523664599
1999	55.2471202150442
2000	59.6369341134567
2001	53.8399214972567
2002	50.358963272367
2003	52.6992861098454
2004	53.2650742121049
2005	56.9710686520446
2006	57.5919863526574
2007	57.5187421370261
2008	54.6908342287573
2009	46.8029392387022
2010	49.2299166877949
2011	50.7920723792328
2012	49.4678175088824
2013	50.3528390259606
2014	58.9063864385953
2015	56.7157978683925
2016	52.0941061943007