Year	% of GDP
1962	3.23055084590385
1963	2.3243651980204
1964	2.28270649244329
1965	2.4432545657034
1966	2.18105987230351
1967	3.74121340822819
1968	5.24926208976266
1969	6.62925766517922
1970	9.03697232442716
1971	8.62933243728037
1972	9.3740450201116
1973	12.998356392263
1974	11.4394450263048
1975	19.0048515193779
1976	18.802788169548
1977	22.1564895924501
1978	23.8409034043903
1979	20.3437719630535
1980	20.9520963752857
1981	21.0959632400906
1982	22.2263077382169
1983	21.7159692148369
1984	21.8658035906664
1985	21.392435441076
1986	19.7859588949885
1987	19.3464802696839
1988	19.5866466227332
1989	19.3557005065306
1990	24.477392473628
1991	18.5599749230212
2005	18.4014813125773
2006	14.617422611558
2007	16.2991786844733
2008	19.2083942062677
2009	19.977723344228
2010	18.2754030717281
2011	16.5934473771108
2012	16.7663811866788
2013	18.3458398342822
2014	19.5202997737568
2015	21.115578390201
2016	20.2989097590812
2017	21.0665741212812
2018	22.0411208947414
2019	22.7235411550392