Year	% of GDP
1960	9.70117467015458
1961	9.81259855556001
1962	11.5872782356321
1963	13.3011097387445
1964	14.0672322202689
1965	13.699247749494
1966	14.3137256818672
1967	14.8415115816237
1968	13.4444010927942
1969	13.8224398658303
1970	14.2058459070678
1971	14.1391744881466
1972	15.2735347893601
1973	15.312882973089
1974	17.1952632015218
1975	18.7465305689637
1976	20.8064970652357
1977	24.5311752099628
1978	25.3582966679572
1979	25.7128098127311
1980	29.542831264886
1981	31.1556453856872
1982	31.2423468082886
1983	30.8924383400516
1984	25.2309541269737
1985	22.8788084312304
1986	24.0178157373785
1987	25.868992426356
1988	24.3934408921358
1989	25.0727846522469
1990	26.3773860496436
1991	26.4186571644135
1992	12.5202643154533
1993	8.04895695623619
1994	7.47640961197704
1995	6.84825406635548
1996	6.79991155329721
1997	5.52816678239915
1998	6.43348529599776
1999	6.76359969387726
2000	7.24834770978704
2001	7.84074915902624
2002	8.06333960214488
2003	8.23854970959904
2004	7.79541952361572
2005	8.40286242580155
2006	8.12353298418805
2007	8.28508670414223
2008	9.23971527903247
2009	9.64395738517045
2010	10.7779374242217
2011	12.3263650704915
2012	12.4120200108143
2013	12.9611374928781
2014	13.7278364272632
2015	14.1903930856487
2016	14.3706640485152
2017	14.0633461453046
2018	14.6820776289898