Year	% of GDP
1975	11.410859807194502
1976	11.04869580648353
1977	8.761082913557242
1978	10.475367677666366
1979	8.57013312944107
1980	7.61415330624879
1981	7.294397107236687
1982	7.18462278937639
1983	8.840937188966809
1984	11.311198745473884
1985	18.80712265627868
1986	23.191597543177906
1987	18.34563596344371
1988	20.990801096408923
1989	28.97691763711937
1990	20.917168125019668
1991	22.89884671509208
1992	18.334479127319632
1993	25.41649797541871
1994	27.360640126899472
1995	27.335425413536715
1996	32.53892867928869
1997	43.49622584919638
1998	39.639906540387805
1999	75.08766589740408
2000	79.66545765261209
2001	63.71996584467418
2002	47.04462692736316
2003	54.478040395881564
2004	57.11974278637041
2005	59.59328679481035
2006	76.7471407621254
2007	80.48491702614957
2008	36.2660255170204
2009	52.88620302008217
2010	52.26182521573352
2011	40.67394104993176
2012	49.9355075696863
2013	60.00544581824775
2014	53.278514079559486
2015	64.7888988574578
2016	63.684974996681305
2017	77.21351182325044
2018	54.40462576666645