Year	% of GDP
1960	20.62016211703016
1961	21.40859117368393
1962	22.057418376883643
1963	22.8253815740235
1964	23.319992853696675
1965	26.712259038751586
1966	27.664507140359405
1967	29.273442442181363
1968	30.195737560034335
1969	30.623475973888546
1970	29.83618643108005
1971	28.895143409611947
1972	31.37092394240009
1973	30.648088954573126
1974	21.205023743145883
1975	25.897219411844247
1976	27.11242536801303
1977	29.826944644106945
1978	34.50220368902163
1979	30.91006501853093
1980	28.330951783164007
1981	31.750359793430743
1982	38.49161276172728
1983	45.16542629720748
1984	49.43743673024551
1985	54.39000708060371
1986	60.992404495793814
1987	61.72453443202181
1988	63.21462967244337
1989	58.496562220075404
1990	50.80323504030196
1991	51.26441714868369
1992	53.4757438071797
1993	55.092932224902015
1994	55.028824816339544
1995	53.894298356917886
1996	52.05872743847591
1997	52.72032694893927
1998	58.00800243961805
1999	57.280808586359306
2000	53.915148562380665
2001	60.26466244378196
2002	63.29792854417623
2003	62.21735382608161
2004	58.6038418811151
2005	55.15926140989536
2006	55.563908286261956
2007	60.02079541565404
2008	57.28128015872617
2009	71.97997798156294
2010	66.10190064962933
2011	61.06600518066856
2012	60.00391190935054
2013	64.66435621886929
2014	69.21442911178455
2015	79.94874750784955
2016	85.07925205400987
2017	82.1317112465157