Year	% of GDP
1960	9.343941306744744
1961	10.014583867576912
1962	9.902614638877656
1963	10.062560241993818
1964	9.003893694010626
1965	15.219199578372814
1966	14.76737739799808
1967	14.313173071460486
1968	13.61527307878202
1969	13.617575870415195
1970	14.066899906135335
1971	12.4802400468385
1972	12.668127053669314
1973	11.966306584362217
1974	6.9640389308712605
1975	7.190448632463614
1976	6.552355521647936
2004	1.2660348756305082
2005	1.551834934939523
2006	2.259040905852711
2007	2.4711963566361628
2008	2.680274826430468
2009	3.777809319496738
2010	5.392829069720364
2011	5.387120428769854
2012	5.907559449938353
2013	6.335649161599285
2014	6.8142954506219695
2015	9.875822388924401
2016	10.07668375684991
2017	9.549839732879388
2018	8.580017332662191
2019	8.808960328168466
2020	13.31485765260568
2021	11.195602750283557