Year	% of GDP
1963	14.4247280215925
1964	15.9954053215637
1965	16.2423070825654
1966	15.8742422194489
1967	16.5131948979736
1968	17.1604198166328
1969	17.8943680186585
1970	19.3003388340316
1971	19.387541410454
1972	21.515895486175
1973	18.8247553133242
1974	16.2243094535524
1975	19.6884951539194
1976	20.5159395344439
1991	51.0868111339709
1992	51.8126756118301
1993	54.3543495695553
1994	51.4431552515599
1995	48.5498361033446
1996	48.714755080379
1997	46.1283815182172
1998	49.9144179617746
1999	47.4637317424433
2000	41.4104589064415
2001	46.6315559475436
2002	44.3143142562503
2003	37.3933976775429
2004	25.4770801271843
2005	17.1581474839896
2006	12.5926731950229
2007	9.88280550666716
2008	3.76478601179705
2009	11.2295916492329
2010	13.3643267561728
2011	15.4943450998638
2012	13.7010445504017
2013	16.9015101609498
2014	22.0045167036658
2015	32.311611713172
2016	41.0307468645268
2017	40.1928007129607
2018	24.0971818938763