Year	% of GDP
1981	87.0959764481988
1982	84.4904256432329
1983	75.6718270645917
1984	60.7502642600778
1985	48.4530318531646
1986	53.4639089137145
1987	51.595966117801
1988	47.9898752884609
1989	64.3545884548003
1990	59.0245544412326
1991	56.3923585162532
1992	48.9053038797466
1993	45.3745620609491
1994	40.6391144583519
1995	41.5474222135551
1996	38.6291137305608
1997	41.2831759990412
1998	33.2672503822651
1999	46.2426664225315
2000	50.6504509025369
2001	34.061467412903
2002	29.1159925901111
2003	27.2555481632904
2004	30.1528663534117
2005	36.2116448822174
2006	49.902950200824
2007	26.8111059085181
2008	31.9953222290064
2009	24.8956015165048
2010	24.3208376958008
2011	24.0007267078875
2012	31.892587946681
2013	18.1007124405462
2014	21.0596913257927
2015	15.8201221733774
2016	15.8408416622023
2017	18.2554563399199