Year	% of GDP
1960	22.0790378006873
1961	20.6094627105052
1962	21.4067278287462
1963	21.8635363169479
1964	19.4823867721064
1965	19.4630872483221
1966	21.505376344086
1967	24.0532241555783
1968	23.8374938815467
1969	23.4762979683973
1970	24.2461792647666
1971	23.4519104084321
1972	23.2872503840246
1973	27.6373626373626
1974	28.0173347778982
1975	29.1296960543704
1976	30.4411764705882
1977	30
1978	23.1922068190333
1979	23.1925968768074
1980	24.8432991742115
1981	25.6655536503926
1982	22.495183044316
1983	20.7515672060938
1984	28.3706236599873
1985	24.19147514011
1986	22.9107086113759
1987	25.4525276491524
1988	23.322204617474
1989	18.7799101859512
1990	23.7820743067987
1991	23.2715838361785
1992	23.2062247186426
1993	16.1303024330243
1994	29.6328216871614
1995	30.3684813752133
1996	22.825752849914
1997	21.356509346862
1998	32.7701620952193
1999	28.0222805379694
2000	25.6036524824415
2001	27.9912263677637
2002	15.8606371712111
2003	20.1704565534983
2004	18.8482493164564
2005	18.1211555073435
2006	17.6338350360624
2007	23.3114453084264
2008	22.6567586927244
2009	20.0286534750189
2010	22.7870608045788
2011	20.7771672832812
2012	26.2034014933767
2013	35.6597738142257
2014	33.7015679642218
2015	29.1565198766117
2016	32.9669183147695
2017	29.1628440790498