Year	% of GDP
1970	22.614797530964008
1971	20.606561922295015
1972	24.762211301336208
1973	24.619089108224205
1974	15.757069072750381
1975	10.579653156695665
1976	13.807391646508648
1977	16.507187613384954
1978	20.468700986795145
1979	21.005152734742534
1980	20.294631495152153
1981	17.65142878330541
1982	17.911113292712574
1983	17.799107677588058
1984	16.664169494336452
1985	18.93299950424645
1986	21.870782031344127
1987	22.808800317512993
1988	22.452200622453397
1989	22.507114850411636
1990	21.063473942081014
1991	18.37866524606226
1992	17.387838509797014
1993	15.00110842367614
1994	15.928801021101997
1995	17.81836922281016
1996	17.29547623632547
1997	18.527682140380584
1998	19.14911770842414
1999	18.677440393474075
2000	17.732881997815745
2001	17.94018883106831
2002	17.742794545540878
2003	16.710141665800286
2004	15.953833284592806
2005	14.582444459603783
2006	15.093429094080085
2007	15.542137800258384
2008	14.025908397257103
2009	13.937299387742097
2010	13.481323412109916
2011	14.407922021200564
2012	15.20713834123583
2013	15.730694510259582
2014	15.466246253019822
2015	16.594658491312813
2016	16.979942137428626
2017	18.236117268523497
2018	18.753148757259602
2019	18.944688041896004
2020	16.97270529551537
2021	17.804980624009154
2022	18.244035331894782
2023	20.42165346462266