Year	% of GDP
1960	7.89909903078257
1961	10.0693446580091
1962	12.1908515861994
1963	21.7700385020832
1964	18.7710177212107
1965	15.4054054054054
1966	17.5331154856151
1967	15.4640718562874
1968	17.6694053033182
1969	18.345854915388
1970	19.272621391593
1971	16.8125594671741
1972	21.0258064516129
1973	16.885164494103
1974	10.3841807909605
1975	12.0250865051903
1976	17.5074398553748
1977	24.4653723558389
1978	27.0146651455887
1979	24.768228712153
1980	19.6456026190598
1981	16.5610748598707
1982	13.2386330970629
1983	16.3812114755238
1984	15.2096131602622
1985	20.9914695101633
1986	32.261648013254
1987	40.7586174740147
1988	31.70930738007
1989	28.2068888056908
1990	19.9744539059608
1991	21.8620772457176
1992	21.01245727102
1993	20.5050821771054
1994	16.9060222723713
1995	18.3312459599224
1996	15.0066945893985
1997	16.0830143771509
1998	23.7951984877127
1999	20.9908394287705
2000	12.5186519594258
2001	20.6817942130367
2002	19.8243415170943
2003	18.4659539287269
2004	12.90852640077
2005	9.65019416724409
2006	8.62423226295279
2007	2.31645005459124
2008	6.06094727841837
2009	7.8957618519103
2010	10.4813957281306
2011	11.4532838160502
2012	14.1036276619963
2013	12.8604328647543
2014	13.824696340789
2015	16.8800551326356
2016	23.1868051162682
2017	18.3590142879194
2018	23.1337248060008