Year	% of GDP
1968	56.92237847414461
1969	60.522005920100256
1970	57.74512253724171
1971	58.3076950000875
1972	60.590062111801245
1973	57.07848142738181
1974	44.99429762816972
1975	53.47999119375434
1976	55.416864045476075
1977	57.285332614029
1978	60.160298119011
1979	54.92853945132548
1980	53.86371414746598
1981	56.16676250315559
1982	58.45183816965819
1983	61.05462456797434
1984	37.417776000304706
1985	38.113594453684954
1986	42.39181719313452
1987	38.76415271796801
1988	39.83188725762439
1989	34.28794837790436
1990	32.394903435806604
1991	36.06559622214643
1992	38.03733671420166
1993	40.496317957983486
1994	46.944545883355396
1995	48.530040803215854
1996	42.21935341240523
1997	40.344346088828665
1998	45.809183846261305
1999	45.7783100737051
2000	43.08184906610315
2001	45.976814861075304
2002	43.25207177444441
2003	41.524159896107385
2004	37.27535930667019
2005	35.07086290472673
2006	36.3493328091066
2007	39.352621957025605
2008	38.79836743508263
2009	45.913065304974886
2010	39.03186321874201
2011	38.63664524460613
2012	44.874397708972104
2013	45.56550221174181
2014	51.66747815955206