Year	% of GDP
1960	4.79821380658126
1961	5.49014489100169
1962	6.20478359268408
1963	7.984825083597
1964	8.07743089382329
1965	7.89248149590962
1966	8.95973154362416
1967	9.16072842438638
1968	7.67598468149939
1969	5.61109887689936
1970	7.20701309499639
1971	9.22257560288823
1972	9.49905116822229
1973	10.4304953782556
1974	12.6558095608856
1975	16.6592144458234
1976	19.6805643060815
1977	19.0159612024967
1978	22.9719828893124
1979	26.1808234486845
1980	35.7542189528343
1981	42.6667698498684
1982	46.0224368962294
1983	48.9915249720164
1984	42.9342370397509
1985	59.1686112637521
1986	48.0679513184584
1987	23.4953280414589
1988	22.407083907426
1989	21.0680602036071
1990	36.267416095786
1991	19.1790782373906
1992	11.9600578342771
1993	9.38825031343041
1994	90.0446281464413
1995	64.8092615994294
1996	52.2214779335272
1997	60.1393068093168
1998	51.1326697001732
1999	50.0795954392177
2000	54.4090900793032
2001	35.5908190660762
2002	29.9959327065326
2003	26.9809009632039
2004	22.2942439236421
2005	18.2577682514288
2006	17.4265404758145
2007	8.60979877045462
2008	11.9908394398082
2009	14.3853654689775
2010	17.3345167629221
2011	16.3472901964726
2012	14.0054830636186
2013	12.2057012925873
2014	14.5080076983595
2015	18.5584130659121
2016	21.8028855450775
2017	21.9283522100836
2018	23.1990021594686