Year	% of GDP
1968	16.894580990090013
1969	15.950313171269542
1970	17.04502206856698
1971	13.558893712038733
1972	16.705224680363266
1973	18.816207472818807
1974	19.276507083806663
1975	16.707355985101504
1976	18.7228325981175
1977	21.024057816569723
1978	19.96043294516474
1979	19.245063041662426
1980	19.449248744561878
1981	16.391442538515907
1982	14.158598894311128
1983	14.398884382069305
1984	15.050139628749173
1985	16.844288050826005
1986	22.089046713031138
1987	21.3122328625331
1988	22.427556681465763
1989	20.615997948794973
1990	20.880999021521816
1991	22.93697139778132
1992	19.08533875536864
1993	17.902653182055264
1994	19.101415176269626
1995	18.507087536764516
1996	15.109326154663982
1997	13.498266054855772
1998	12.87348160840733
1999	13.539634199557812
2000	13.574968672597388
2001	12.834635393711228
2002	13.925460616832149
2003	15.39649530557293
2004	16.828364402706505
2005	18.424069096692616
2006	19.010772289036606
2007	18.638649868678854
2008	19.568208607597136
2009	18.669996638601543
2010	18.45591352774436
2011	19.345556425497172
2012	18.371328426176987
2013	18.189799347830405
2014	18.15609511336734
2015	17.36986727413813
2016	17.477857283163303
2017	17.102127632402777
2018	16.36558246401503
2019	16.17890590584475
2020	14.437460219909113
2021	13.059873371022897
2022	13.541060645858998
2023	10.792854640751248