Year	% of GDP
1980	20.868714772154302
1981	19.849197551117275
1982	19.8183457899005
1983	20.22050548457111
1984	21.146456819889032
1985	21.221155245167413
1986	20.94862600285661
1987	20.74942297516918
1988	20.4535441955633
1989	19.852838413605493
1990	18.379456641508245
1991	16.693086155986297
1992	15.868668342628862
1993	16.226113890730684
1994	17.72945463023059
1995	19.759037913794668
1996	19.23376919436076
1997	19.54589260131424
1998	19.861675271319452
1999	19.684618285586094
2000	20.158744198349687
2001	19.217439892704128
2002	18.67144972782581
2003	18.0807020100601
2004	17.390327306184663
2005	17.15572902184686
2006	17.15140751675066
2007	17.18175405794334
2008	15.790153895388178
2009	13.748340026104652
2010	14.72058419831536
2011	14.59704579381717
2012	13.920465626491083
2013	13.30496398983852
2014	13.062866760336913
2015	13.605165627266475
2016	13.191866602975155
2017	13.045529453023008
2018	13.031444154533704
2019	12.804411580358835
2020	12.36082768453865
2021	13.162095433967892
2022	13.410402088167714
2023	13.055831715296728