Year	% of GDP
1977	16.0479304378804
1978	14.4949991583111
1979	12.7169949747687
1980	15.1542169850612
1981	14.5610567765811
1982	17.8714711598511
1983	16.6167901434723
1984	15.6304576919987
1985	17.0353865018954
1986	15.2010586580288
1987	14.433854401064
1988	12.9598908068399
1989	14.0964108897333
1990	12.1984328000771
1991	12.5859463231322
1992	11.7565399823412
1993	11.8124033621331
1994	12.5964414139295
1995	14.0946667904184
1996	13.7105829923795
1997	14.5915193830471
1998	18.4450704602919
1999	18.3529679732895
2000	19.0932264480806
2001	22.7107262704968
2002	22.6407973145348
2003	19.2025094711681
2004	18.7021400209652
2005	15.9258564162554
2006	13.5287349736716
2007	11.6603012653627
2008	12.196670323106
2009	13.9853500518404
2010	13.7067401363326
2011	13.9255311431145
2012	15.108154516542
2013	14.6442031030917
2014	14.7026159461755
2015	13.6993588961858
2016	12.2042164021027