Year	% of GDP
1977	69.3902907387549
1978	65.7701999723558
1979	70.1734001721557
1980	66.4459662773785
1981	72.3275643984014
1982	63.4686506351836
1983	60.1104377491969
1984	64.1736859558991
1985	59.7359276678304
1986	61.4349738491015
1987	64.3260324060254
1988	58.963167148175
1989	63.6587962544988
1990	56.0313489278389
1991	57.85486210628
1992	55.5373346318071
1993	50.7716880587099
1994	50.6108575024737
1995	47.5342203290384
1996	51.7415348053722
1997	52.4324943192567
1998	47.1462646136548
1999	48.1323066305463
2000	49.7739651598669
2001	48.6735962534562
2002	52.9832565107014
2003	57.2045847359316
2004	55.9748542394273
2005	58.0323114974293
2006	68.0964498945021
2007	74.8343545360338
2008	72.6129759297029
2009	59.8384487296563
2010	62.9064250152481
2011	66.4429113871496
2012	60.8893091351119
2013	62.1989165045118
2014	62.8493669223438
2015	60.5990390293031
2016	72.2073662877597