Year	% of GDP
1977	32.0366730678226
1978	45.0204543884756
1979	39.7530381445639
1980	40.2439887740187
1981	42.0775901183853
1982	44.2552716345304
1983	47.1811513003124
1984	52.9257318508895
1985	56.5772008060654
1986	57.7499655969777
1987	51.8828798283911
1988	62.0264747504754
1989	53.6346720928991
1990	54.1536931179997
1991	44.4857857101331
1992	49.6364907556683
1993	41.7318268307705
1994	38.7839084080939
1995	43.1352698105032
1996	45.0201123502858
1997	42.6559060426272
1998	42.1323476347914
1999	45.3484775509395
2000	45.2768874864392
2001	40.9133153292365
2002	38.6055869634579
2003	35.8752287879638
2004	35.3500181078593
2005	36.4144028981402
2006	34.7002817986493
2007	31.0061136742657
2008	30.2213997555146
2009	28.4933024132758
2010	26.8926919935904
2011	27.0362445409585
2012	27.1743153679757
2013	26.0809072556858
2014	34.7428043864134
2015	37.8320276401993
2016	37.7928636425727
2017	35.2310580054006