Year	% of GDP
1960	9.701174670154582
1961	9.81259855556001
1962	11.587278235632104
1963	13.30110973874454
1964	14.067232220268867
1965	13.699247749494045
1966	14.3137256818672
1967	14.841511581623715
1968	13.44440109279425
1969	13.82243986583031
1970	14.205845907067824
1971	14.139174488146603
1972	15.273534789360141
1973	15.312882973088952
1974	17.195263201521787
1975	18.746530568963724
1976	20.806497065235682
1977	24.53117520996282
1978	25.35829666795716
1979	25.71280981273109
1980	29.54283126488604
1981	31.15564538568715
1982	31.242346808288556
1983	30.89243834005161
1984	25.23095412697366
1985	22.87880843123039
1986	24.017815737378463
1987	25.868992426355998
1988	24.39344089213579
1989	25.072784652246888
1990	26.377386049643647
1991	26.418657164413535
1992	12.520264315453314
1993	8.048956956236191
1994	7.4764096119770445
1995	6.84825406635548
1996	6.799911553297207
1997	5.528166782399152
1998	6.433485295997758
1999	6.763599693877256
2000	7.248347709787044
2001	7.840749159026242
2002	8.063339602144875
2003	8.238549709599042
2004	7.795419523615725
2005	8.402862425801546
2006	8.123532984188047
2007	8.285086704142225
2008	9.224611267424242
2009	9.628984057286157
2010	10.758195391769776
2011	12.287895470525454
2012	12.371509115474806
2013	12.923391117910315
2014	13.692269488628812
2015	14.152731084213476
2016	14.33273718289023
2017	14.024659764756844
2018	14.64789806969937
2019	14.057457899706167