Year	% of GDP
1976	18.1032963158823
1977	18.6268829663963
1978	15.8693738999246
1979	14.3707888040712
1980	18.4205013736264
1981	27.8177676537585
1982	23.9456936784047
1983	17.9956901376917
1984	17.9168979420851
1985	9.3594476710994
1986	8.34159420089329
1987	7.69077244006536
1988	14.4476294447246
1989	12.6643316133102
1990	15.3022610040599
1991	15.1386071670047
1992	22.2758199616329
1993	26.939302846679
1994	20.8222978978588
1995	20.5680462960697
1996	18.3542765006204
1997	16.1166386834715
1998	11.5297403931353
1999	18.2782723042021
2000	16.3164748359861
2001	14.3817414602153
2002	13.9211492468191
2003	14.2522286265341
2004	18.9199683418287
2005	24.531868656512
2006	19.0359509267095
2007	21.4923446840232
2008	22.7975623690726
2009	21.5619484645252
2010	23.0167330677291
2011	21.7681470287135
2012	19.3586882259166
2013	16.7075724576981
2014	16.1649347605282
2015	15.7652303120357
2016	14.200503054258
2017	14.8459021554856
2018	13.6107776762428