Year	% of GDP
1960	-5.82278481012658
1961	9.95698924731183
1962	10.1215805471125
1963	15.0181818181818
1964	22.2087378640777
1965	20.6616643929059
1966	26.7457180500659
1967	31.9942194919772
1968	31.5732172824304
1969	28.0686697432258
1970	26.2886323167164
1971	29.320570915032
1972	29.0144370177212
1973	24.0733924156035
1974	26.9045316659562
1975	30.2387906796547
1976	37.2138116773137
1977	34.4976321812978
1978	30.7471656386054
1979	26.5782148793736
1980	22.5517614678094
1981	21.4948927337799
1982	21.9252191881468
1983	18.4556370419881
1984	18.8748061663167
1985	23.4688543588214
1986	23.9656412988056
1987	28.244084422082
1988	20.5800865335086
1989	21.2276280680606
1990	17.5079274973265
1991	16.3827085072928
1992	20.5711207242563
1993	21.3480746881537
1994	18.3993928914505
1995	18.8868403059974
1996	18.3643733408592
1997	25.5106305355194
1998	24.5683680033585
1999	32.5229230052355
2000	39.2976119030668
2001	35.1301783653823
2002	34.5915857814911
2003	26.9219556854699
2004	31.4261043164277
2005	30.8398252801338
2006	21.1039648568068
2007	22.8626544237177
2008	27.9003014254014
2009	28.7003531299048
2010	28.3704394197001
2011	27.4801772404307
2012	31.3356656963193
2013	26.3828980524316
2014	27.8612455464564
2015	27.1913541387102
2016	26.6780761358731
2017	24.5038169961093
2018	26.0794225843253