Year	% of GDP
1960	17.2680412371134
1961	17.2413793103448
1962	18.348623853211
1963	18.5619955979457
1964	16.5348670021567
1965	15.8023184868822
1966	16.3978494623656
1967	17.0419651995906
1968	17.3764072442487
1969	16.5237020316027
1970	16.3568773234201
1971	14.8221343873518
1972	13.8863287250384
1973	13.3791208791209
1974	14.2361863488624
1975	14.1023220690957
1976	14.1013071895425
1977	13.543956043956
1978	16.7603347071313
1979	18.9705031810295
1980	19.2916127748483
1981	17.8684234274885
1982	17.5016056518947
1983	16.4161458883887
1984	15.6963813808353
1985	17.6872846933004
1986	19.6922238866948
1987	19.103746507979
1988	15.7112947034857
1989	16.3347162010555
1990	15.0591215187715
1991	12.0086768761142
1992	14.0846212961448
1993	13.0300765736104
1994	31.5544271203148
1995	20.9503479949399
1996	13.9809539224698
1997	17.5202499474829
1998	14.6836338748822
1999	13.4459910050491
2000	14.5778385471568
2001	15.8088305369244
2002	10.507191590428
2003	9.39791339101711
2004	9.43958737759919
2005	10.787801754538
2006	11.3941159486131
2007	10.9939564834833
2008	13.2280032712649
2009	15.9463069217763
2010	14.2314104667119
2011	13.4040891096504
2012	14.3849026964598
2013	16.3672544403341
2014	12.5377903137228
2015	13.8994965789327
2016	13.5873003345339
2017	13.6739682272093