Year	% of GDP
1962	7.11205157750949
1963	7.48998201243852
1964	7.65356385811205
1965	6.86885768588297
1966	6.77217297409502
1967	6.91615373065622
1968	6.95293053067904
1969	8.92866452376004
1970	7.86416666066444
1971	8.36507885999262
1972	9.57985150083338
1973	10.2917656772107
1974	10.5102304866057
1975	20.3313062353027
1976	17.8566079293243
1977	17.0828996652925
1978	19.1685100531736
1979	18.5921991775979
1980	23.5149102139222
1981	19.5030204439177
1982	27.7760442670652
1983	31.7012460807891
1984	28.6283467373391
1985	32.1258177128909
1986	30.374085588136
1987	29.118625479641
1988	29.8484993383077
1989	21.0561464849025
1990	21.0684174128574
1991	13.9468946818933
1992	12.6506610407041
1993	8.64178165274591
1994	10.9358113725993
1995	10.8691873210178
1996	10.1323371544108
1997	7.04243598198624
1998	6.53825576630022
1999	6.03299559205362
2000	7.35893833369779
2001	3.29191000965568
2002	3.24657479139177
2003	8.17298571364609
2004	7.88707073167445
2005	10.0820040793799
2006	9.72881057607635
2007	8.7100672970697
2008	13.3754363225329
2009	19.0101410859837
2010	18.6292371169474
2011	21.7661835151617
2012	20.0090459120145
2013	20.9659260719916
2014	22.7565556019852
2015	22.9208587550498
2016	26.4118693108681
2017	28.3664938312284
2018	26.9585214712877