Year	% of GDP
1964	7.63950120377369
1965	4.14455244796947
1966	5.5884059572822
1967	7.66745721428114
1968	9.07922645040549
1969	8.98335636603978
1970	7.97679751025232
1971	8.15550744224519
1972	8.82502755216389
1973	9.11061748873952
1974	12.6298755034112
1975	7.06850422439198
1976	6.89297645026839
1977	4.3398500756927
1978	11.1319493884775
1979	14.6898744332599
1980	13.5978805297226
1981	18.7566932907715
1982	19.4473078188398
1983	21.4022730433746
1984	18.7518088194227
1985	18.0119748398671
1986	17.6260377110954
1987	17.7084346656748
1988	19.6500486957437
1989	16.9504874309025
1990	16.8285726075161
1991	18.1424553322825
1992	16.4456120010062
1993	16.6648531373266
1994	18.917769153516
1995	15.9817104560659
1996	21.1395286963132
1997	19.9431738623104
1998	22.2794102948526
1999	26.1719148001757
2000	21.6108284227819
2001	23.8119818452261
2002	26.2823005067546
2003	26.3196806318565
2004	25.6273635394878
2005	23.3631451925273
2006	28.5762500954271
2007	23.8165019686743
2008	19.7657260931832
2009	22.7293339885896
2010	26.6433417684674
2011	29.6111343221965
2012	28.834230096173
2013	27.2273757377049
2014	29.3650560012081
2015	30.4527548607082
2016	35.6883856475041
2017	36.2023174013661
2018	42.8699862493936