Year	% of GDP
1960	11.5455088946963
1961	12.097459482075
1962	11.8046998767823
1963	13.3300256346647
1964	15.1986317344321
1965	16.2187790739283
1966	18.0879697454942
1967	25.1221869613544
1968	25.171102661597
1969	27.8970795942533
1970	28.9679796051841
1971	28.2116413490016
1972	27.9397104201282
1973	24.7415834243485
1974	20.1856468864329
1975	20.2787244209432
1976	20.2509471245253
1977	19.2120996009286
1978	18.1111297133397
1979	16.0746921122193
1980	17.3244251586646
1981	18.2359398833621
1982	19.8324378595463
1983	20.5830218937627
1984	18.8458569087739
1985	16.3300028157488
1986	16.0067981016231
1987	14.9193382100015
1988	15.3777266705661
1989	13.8012514844462
1990	13.5156456556547
1991	16.0057103773951
1992	26.6236411082151
1993	29.7652700701018
1994	29.7126630736338
1995	26.8281905340403
1996	26.0622409294463
1997	33.2321798958093
1998	26.2425242691779
1999	25.1630299839201
2000	25.0262797405275
2001	25.7907172800758
2002	24.7190996652784
2003	15.1784513950884
2004	14.409764126438
2005	13.8392342995169
2006	12.5486567316584
2007	13.3336014184721
2008	17.152052224765
2009	19.289945777399
2010	21.8585391276331
2011	24.4614071630384
2012	28.3841488883091
2013	28.7127924458404
2014	31.2704769028422
2015	36.9649272277122
2016	34.3529924193209
2017	33.389158385703
2018	35.9272433968868