Year	% of GDP
1960	21.67153432393192
1961	18.76417921497072
1962	17.265976863959782
1963	17.950778733522434
1964	17.44224397322901
1965	16.187273915639746
1966	17.68012834471868
1967	18.65154234710043
1968	21.150126169337668
1969	22.23095817015406
1970	24.945843155662214
1971	24.028931164721577
1972	19.433967474016008
1973	27.49018790122247
1974	30.37131231263602
1975	28.75947714561561
1976	20.344150942165832
1977	26.413765281431438
1978	29.37154422655457
1979	31.28085932867155
1980	32.96010916055688
1981	48.44988954982586
1982	45.99876444342752
1983	46.20969951593753
1984	41.74891265867598
1985	32.57300094250707
1986	32.86968580042267
1987	47.58567736571191
1988	42.674467324557455
1989	80.0556763398612
1990	32.42070776746544
1991	22.799035290632418
1992	22.478577756554387
1993	25.993533726675338
1994	26.578763595400872
1995	27.867950746371328
1996	28.220310325473385
1997	30.376199126542126
1998	32.50284355235396
1999	35.5044239797124
2000	34.45169201942268
2001	37.243363754864916
2002	62.42108612195278
2003	50.62782079197253
2004	41.89491098618025
2005	34.94079812602097
2006	28.168600324333
2007	25.83251510909844
2008	21.961534168156984
2009	25.663791022359117
2010	25.33231864863284
2011	26.465961071620335
2012	30.601221588446563
2013	33.18739157147892
2014	34.43213956946164
2015	40.42762793702969
2016	37.93224825787091
2017	38.86839838711728