Year	% of GDP
1960	15.7272717524418
1961	20.072874250127
1962	21.27642233178
1963	17.0059153484824
1964	20.4249988652778
1965	15.357616334766
1966	10.8333335912698
1967	9.91766218211001
1968	14.4805821728014
1969	15.2976971339514
1970	13.610864877728
1971	14.1630464215882
1972	18.8808331366086
1973	17.874151367274
1974	16.1662246728833
1975	14.6027585429469
1976	16.0700325495868
1977	13.8368224127733
1978	15.4600676061998
1979	18.0544146447902
1980	12.8705830122564
1981	16.3082487211099
2006	-4.88313195682581
2007	0.540675957972505
2008	4.964943344365
2009	4.8276746189501
2010	4.78127813093516
2011	-2.57726260304426
2012	-1.98191286952519
2013	-2.07088493544429
2014	-0.607983748758687
2015	-0.411140734651524
2016	-1.18697784869419
2017	-2.46913113860585
2018	-5.3247182714035