Year	% of GDP
1975	25.397236195614614
1976	25.160132414894022
1977	24.95332262110961
1978	25.032353273509074
1979	25.039876217624307
1980	24.353321399643317
1981	21.995019016593375
1982	20.795782899203942
1983	20.38837169556388
1984	20.17550511859193
1985	20.19365925618368
1986	21.47006322180591
1987	21.379740814247675
1988	22.686890989716343
1989	23.215772239745196
1990	23.327394253897303
1991	22.960770589291204
1992	22.37867511498724
1993	21.237205985937916
1994	21.35331178950951
1995	21.875219981754523
1996	21.762576348006622
1997	22.798806004822794
1998	23.856331657080194
1999	24.493878048133773
2000	23.838600952844498
2001	23.94047626430343
2002	22.752387569428585
2003	22.23834621684236
2004	22.552434367671236
2005	22.46406938619346
2006	23.307757403568363
2007	23.74871741531151
2008	23.440962927269386
2009	20.971933575945133
2010	21.086119511151207
2011	22.11534335606822
2012	21.45571394216503
2013	21.389821829010668
2014	21.488940536256894
2015	22.25486926257557
2016	22.00607564956831
2017	22.752944566294044
2018	23.15691984366343
2019	23.7696009751507
2020	20.847884852453337
2021	23.569271673914105
2022	22.63826380775772
2023	23.01126419393626