Year	% of GDP
1965	7.793733528255957
1966	8.78361877070768
1967	9.602440396619302
1968	10.800548481698357
1969	10.068264926422723
1970	12.615111780931462
1971	16.003559882305932
1972	17.12846134038424
1973	18.296481391504642
1974	11.390919719785764
1975	14.0633291713957
1976	13.817671310447704
1977	15.445173563597914
1978	17.33303616150897
1979	16.45623198319694
1980	14.433252542684214
1981	13.527155024203324
1982	15.090340004919605
1983	12.042146348565272
1984	12.102476466493236
1985	12.412995976751244
1986	13.61463265712638
1987	16.26814806237605
1988	15.234626461121465
1989	16.384976559635902
1990	14.635004933372716
1991	15.10370322427372
1992	14.276620025743714
1993	14.851709904165237
1994	14.485155713765135
1995	14.599485976386886
1996	14.055885313507138
1997	14.714868268307216
1998	15.996374558753166
1999	14.074319661632403
2000	17.23724426335832
2001	17.098392190654334
2002	18.3444852340428
2003	17.04585824659671
2004	17.758220923614264
2005	18.95171390619216
2006	19.61110929257705
2007	16.060078446469056
2008	16.906650760609548
2009	15.052158131440391
2010	17.7577080428603
2011	17.766837413844762
2012	18.96868751460343
2013	18.155769905576978
2014	18.907836162890806
2015	19.73458939592547
2016	18.407860833613775
2017	18.262803178135677
2018	20.019668096936233
2019	19.649582113754402
2020	16.18645892255183