Year	% of GDP
1960	7.271643570257785
1961	7.330909090909091
1962	7.2309899569583935
1963	8.629097805472771
1964	9.367380982933401
1965	9.17862444334488
1966	9.775698692575267
1967	10.346353878499501
1968	11.298749766747527
1969	12.355707567336468
1970	11.70228337236534
1971	12.355871886120996
1972	13.88666622942218
1973	11.592588567702673
1974	13.412140843885407
1975	12.65417466230199
1976	12.97487004602192
1977	15.693685280303239
1978	20.311496542833705
1979	22.62584228911753
1980	17.05097178589144
1981	18.111522851596966
1982	19.527701082246722
1983	21.012902854417316
1984	19.28889206873675
1985	20.195535026943805
1986	19.724138315299154
1987	20.15661615571133
1988	21.768206431152077
1989	20.159950137162504
1990	19.594386296397584
1991	8.79853361801555
1992	9.045788333885907
1993	9.818922462542412
1994	10.823300246596348
1995	30.966063267103145
1996	29.81175012497917
1997	29.357241382408972
1998	28.68103294151393
1999	29.2391246361768
2000	28.81872020202984
2001	30.706594723027887
2002	31.003523239412157
2003	30.70585864882127
2004	32.35024404055593
2005	33.04694529246203
2006	34.63729681402126
2007	34.22546090958474
2008	29.531744246096856
2009	25.70873435387369
2010	24.615420917142515
2011	33.646268732773464
2012	33.92492882321123
2013	33.43308974263221
2014	34.3783681775607
2015	39.26898572396885
2016	42.33577604692129
2017	43.754386840859
2018	46.56044271866852
2019	46.87156078845657