Year	% of GDP
1960	9.937496332647012
1961	9.366674580354198
1962	11.512263054567635
1963	11.800664432878127
1964	12.177067188872018
1965	11.655874425981445
1966	13.04955519766951
1967	12.817818700408502
1968	13.64472672013694
1969	14.671066799525272
1970	14.712037302873664
1971	15.51271295203653
1972	15.368366783768817
1973	16.761615916878142
1974	18.450210410483397
1975	17.616057198461434
1976	19.483527115243437
1977	22.34576620764845
1978	20.445331257190066
1979	20.937985326117435
1980	22.69265398879137
1981	22.902498245246505
1982	22.538294438473052
1983	23.66620686490074
1984	23.386219090172055
1985	22.850307986415434
1986	20.45118303228576
1987	17.48768822520461
1988	19.20299972306699
1989	20.409638156075385
1990	21.233685265310378
1991	21.628944046288407
1992	18.829312068653284
1993	11.918811481546788
1994	13.981848003100847
1995	11.958859779381552
1996	10.273859474371152
1997	10.978175273035141
1998	11.178554837587923
1999	11.858818386383808
2000	13.401148205749028
2001	12.70845093769406
2002	14.341494680961983
2003	13.599139814279956
2004	13.631176109146805
2005	13.899350129485141
2006	14.152091001079192
2007	15.506335026157428
2008	16.37158362473682
2009	16.672872915693205
2010	18.31440504524595
2011	19.018038716454395
2012	17.820338205576725
2013	18.354571020957934
2014	19.27256074545661
2015	19.783242308813826
2016	19.740634135197098
2017	19.89720844058678
2018	21.40184924521904