Year	% of GDP
1970	30.26623323014898
1971	36.482393280512404
1972	37.51724585860393
1973	32.75653147947555
1974	35.44796640656605
1975	42.379859145223534
1976	48.55713209653752
1977	45.96814381379994
1978	49.101460512179045
1979	42.87239722877584
1980	42.63744110657815
1981	51.3111619860985
1982	28.418499993913564
1983	53.72665092828871
1984	49.57332905188999
1985	57.856320182527746
1986	67.82907650307534
1987	66.7803779489466
1988	63.65534754666328
1989	63.71400160711034
1990	51.46805360409156
1991	58.10455319355493
1992	59.1994227760647
1993	57.183674416688355
1994	56.60718759159761
1995	57.87929994833744
1996	57.20634785071643
1997	59.29274639543757
1998	71.08025419134069
1999	69.12413744084334
2000	63.289950552433496
2001	69.80637323891497
2002	72.06705552290444
2003	66.39631807844616
2004	58.23675583480299
2005	58.50414096736173
2006	58.00548737458302
2007	68.80868688253322
2008	69.59957795868547
2009	82.5448098905826
2010	81.3751074399655
2011	75.18576709796673
2012	73.21389341050741
2013	74.86080733381067
2014	77.70966195042449
2015	85.8124019508994