Year	% of GDP
1977	68.3537785234405
1978	82.7108008843914
1979	82.0359720470572
1980	81.381981720408
1981	73.2642283658348
1982	62.3200442805966
1983	52.6791387738989
1984	54.3836585812516
1985	52.7625393620733
1986	60.7786641233183
1987	61.9916955254255
1988	67.8067268377792
1989	72.8454888898472
1990	62.6960153753891
1991	62.4742080892205
1992	60.7091556220532
1993	59.0970863947669
1994	57.8602072887061
1995	56.9398919560855
1996	54.9829910148786
1997	58.0815203040057
1998	54.0717792734553
1999	53.9752758558686
2000	53.4500249635579
2001	50.4388468705632
2002	49.6000642594906
2003	56.5274213235698
2004	56.3474300227
2005	58.5518112202899
2006	62.2867619779315
2007	58.4155619052284
2008	63.7494999129138
2009	50.6714784040806
2010	56.2767271771077
2011	56.5145305658908
2012	52.2709072875144
2013	49.7034700782445
2014	45.7632698498762
2015	42.7915652757241
2016	43.7359802610676