Year	% of GDP
1960	9.34394130674474
1961	10.0145838675769
1962	9.90261463887765
1963	10.0625602419938
1964	9.00389369401063
1965	15.2191995783728
1966	14.7673773979981
1967	14.3131730714605
1968	13.615273078782
1969	13.6175758704152
1970	14.0668999061353
1971	12.4802400468385
1972	12.6681270536693
1973	11.9663065843622
1974	6.96403893087126
1975	7.19044863246361
1976	6.55235552164794
2004	1.26692713974143
2005	1.55617716768862
2006	2.26399132037921
2007	2.47580446081963
2008	2.68222036334891
2009	3.77873014813253
2010	5.39309563014871
2011	5.41445203995753
2012	5.90755944993835
2013	6.33564916159929
2014	6.81429545062197
2015	9.8758223889244
2016	10.0766837568499
2017	9.54983973287939
2018	8.58001733266219
2019	8.80896032816847
2020	13.3148576526057
2021	11.1956027502836