Year	% of GDP
1975	50.76696943428938
1976	43.746084777615366
1977	42.436570481979075
1978	37.441912833425455
1979	38.947552004058856
1981	42.82478770748503
1982	46.366227288920555
1983	37.80451127819549
1984	37.95253164556962
1985	35.812332439678286
1986	35.20181405895691
1987	30.149514563106795
1988	32.15097402597403
1989	27.22857142857143
1990	24.113778705636744
1991	27.312888888888885
1992	34.94392523364486
1993	31.48453608247423
1994	31
1995	28.125
1996	26.94812554489974
1997	24.232042121098157
2002	27.248350488255475
2003	27.332455089820357
2004	26.890377086338347
2005	27.388857938718665
2006	32.763671685284116
2007	29.335230934479057
2008	30.31820435510888
2009	30.077125311840337
2010	28.860251947621418
2011	29.18992779520093
2012	28.68949662626142
2013	32.20173081057837
2014	32.92062910798122
2015	30.230369491386718