Year	% of GDP
1970	4.515028524410478
1971	3.38820698492549
1972	3.6769964196340243
1973	5.833971891789516
1974	5.2859171492684025
1975	3.728109598952919
1976	3.991319250054313
1977	5.677078577810041
1978	4.596714213921778
1979	4.419460331590239
1980	7.170608776318493
1981	6.127028141104878
1982	7.193912159890928
1983	5.7284123917126335
1984	4.9715078448490715
1985	4.0163842283353
1986	4.554798142746753
1987	4.323394245279179
1988	4.975849458541639
1989	5.354726782878982
1990	7.058053579396647
1991	5.520767943901651
1992	7.235522328489441
1993	7.201472546442769
1994	11.000405482819449
1995	10.067494056818525
1996	8.217138774544917
1997	7.134054307902027
1998	6.607163191605913
1999	5.296361549215146
2000	6.395955054706699
2001	6.032298381913531
2002	6.4821243508327235
2003	8.082978803834044
2004	7.724411540545319
2005	8.623458434719549
2006	9.008879190257034
2007	9.303136322569168
2008	10.741424586800118
2009	7.7836004350428105
2010	8.28507617363016
2011	10.635493072521651
2012	8.238195515020777
2013	7.313376255745892
2014	6.874325060070824
2015	5.517435437153768
2016	5.311760041224881
2017	5.485059472149722
2018	4.564294217670209
2019	3.985327142421938
2020	4.073914103000389
2021	6.6951680652552366