Year	% of GDP
1962	8.85106806147944
1963	8.58360937140428
1964	9.01069972703192
1965	9.40520271886185
1966	7.19792102399479
1967	7.35727095816719
1968	9.33003354321125
1969	10.7827332145162
1970	10.4632488747932
1971	10.8080857658129
1972	11.559096952553
1973	15.813155873038
1974	17.9461469532825
1975	17.9371939401396
1976	19.9774010852148
1977	22.5437609481024
1978	28.8219367236316
1979	29.8118887165335
1980	32.1973867633123
1981	34.7308218444697
1982	35.3212401886621
1983	36.5800786552602
1984	34.0722956167094
1985	32.894570969877
1986	30.1092349320033
1987	29.0697037265757
1988	31.6535615418093
1989	28.9682702548163
1990	26.5764531063927
1991	25.4542880481285
1992	25.1090794982159
1993	24.2044921113194
1994	19.4110156302881
1995	17.4550911800059
1996	17.5416783856212
1997	16.9294406642787
1998	16.5421065489259
1999	16.8115064361475
2000	18.5561443178867
2001	17.0094997294629
2002	15.511877433877
2003	15.6329722477023
2004	15.6927738146657
2005	16.4110227398042
2006	16.7792757806183
2007	18.3836074226553
2008	20.5292198565617
2009	22.7641868568051
2010	26.472795528743
2011	28.1286890998121
2012	27.7760591406097
2013	31.3329551789704
2014	31.9621998141074
2015	33.6678766746125
2016	36.3372759952053
2017	37.5760976738948
2018	35.3922459603012