Year	% of GDP
1970	4.7012253652722
1971	3.99020326758254
1972	3.5814651941892
1973	5.21784703445966
1974	6.65462440324456
1975	5.86845350187241
1976	4.75722627125512
1977	14.2510557407336
1978	13.2112488583113
1979	12.1543655056934
1980	15.3376618134501
1981	12.0089206137493
1982	15.9634725528061
1983	11.3515372520521
1984	9.8362608967673
1985	6.33199978781604
1986	9.79158576575213
1987	8.70364676484303
1988	9.48998762484786
1989	9.22376823661948
1990	13.4864824653409
2013	17.8127642098138
2014	18.2921917574279
2015	18.8761765982543
2016	19.5454511774019
2017	18.697269661953
2018	11.735774261604
2019	10.7304105687897
2020	11.455284804417
2021	11.2356934915275