Year	% of GDP
1975	18.254470832291396
1976	18.503459493946096
1977	17.72853376723298
1978	17.05132293632445
1979	16.250729993679116
1980	15.044337777505959
1981	13.310862529849071
1982	16.224625561978335
1983	21.989284455507132
1984	24.616005971150496
1985	41.26817788552138
1986	41.677186384012515
1987	35.54654206874956
1988	41.27326568643275
1989	59.792382006374226
1990	37.64183309889059
1991	51.632528492454874
1992	47.04175360258683
1993	51.40831644016798
1994	59.08256434337662
1995	63.37617262909389
1996	83.32208409140371
1997	112.43194965559849
1998	137.7102465007165
1999	155.25244837867146
2000	153.41029903900946
2001	116.55194713140249
2002	84.6802923374213
2003	84.23932562399395
2004	81.81652287168092
2005	86.50137637903697
2006	106.21119187651064
2007	112.68017388523306
2008	40.83759766273395
2009	64.1633219975291
2010	78.01677285549778
2011	65.6860504144394
2012	77.57695781569464
2013	93.2359344846327
2014	88.16428427311354
2015	95.15562830119426
2016	102.76305351101288
2017	131.92774809103128