Year	% of GDP
1960	6.978909709519397
1961	7.311725290479784
1962	7.655618654840368
1963	6.986622239016499
1964	7.795269824354192
1965	8.660769727760659
1966	9.427430087965776
1967	8.40576941338979
1968	7.352613542360523
1969	7.988209887690773
1970	7.0679394991321605
1971	5.634209138567484
1972	4.550878769722388
1973	4.267020431737781
1974	2.750595474394601
1975	4.085455540023096
1976	4.37478976719483
1977	4.0846050603966795
1978	5.276522605920014
1979	7.111172586969127
1980	6.804894579826483
1981	6.938192108340672
1982	9.548039913654932
1983	13.117583264618363
1984	14.75099511810949
1985	16.872219771576166
1986	19.4522700453388
1987	19.363663840514004
1988	22.392177151691733
1989	21.90917620041169
1990	16.113886839566426
1991	16.691842900302113
1992	16.75855366443706
1993	20.46971815288223
1994	22.359757422515457
1995	22.568626355202863
1996	20.792438794932945
1997	21.508734839928305
1998	29.18834755308789
1999	26.744618997129145
2000	24.235613446820725
2001	27.090480162660967
2002	28.94839765858159
2003	28.233310143967653
2004	32.354259427404166
2005	35.4189179790554
2006	33.72458676675941
2007	37.071588765141996
2008	37.68431884664674
2009	45.629801313391134
2010	39.16421338696885
2011	33.828793006959934
2012	36.05139451396635
2013	39.83368658277066
2014	43.697727889376964
2015	54.64604658869753
2016	56.27643095842843
2017	51.97982846731537