Year	% of GDP
1968	17.17436038284623
1969	17.556201158575007
1970	18.16283884790325
1971	18.346672049152836
1972	18.055949273063966
1973	17.885238707927083
1974	17.01558159704556
1975	16.927225370919327
1976	16.510466788728692
1977	15.861260343559758
1978	16.250213207552736
1979	16.785707270074976
1980	15.814097787472544
1981	16.34608688096213
1982	15.56404936301217
1983	15.928974134584767
1984	16.196748460209054
1985	15.948366416215116
1986	16.215632786246363
1987	16.75596238779041
1988	17.803901184832046
1989	17.491988475036315
1990	17.956251804217846
1991	17.91286220034258
1992	17.681115030646406
1993	18.063520351874498
1994	18.084294410607352
1995	18.38660933496626
1996	18.508222155541095
1997	18.966907620026713
1998	18.648388030807894
1999	18.005613898733305
2000	17.961937401924015
2001	17.354449808717813
2002	17.478073104489155
2003	17.144496978333905
2004	16.912535040942558
2005	16.52181017166445
2006	16.831380148197574
2007	16.40251090134755
2008	16.165874093953875
2009	15.928504486332502
2010	15.61078800811542
2011	15.46726318965681
2012	15.469280512938294
2013	15.217834950747013
2014	15.31793182008154
2015	16.879612957708712
2016	16.741155465257794
2017	16.70532188434497
2018	16.84874420996029
2019	16.451777841792175
2020	16.784153874169345
2021	17.258674994670802
2022	17.147550046202234
2023	16.85578848036974