Year	% of GDP
1977	21.25254926977873
1978	20.85099782282751
1979	20.346423474094493
1980	20.81497944952329
1981	20.410398071954766
1982	18.728597750601466
1983	18.49709360853968
1984	19.168855650558967
1985	21.419619404654433
1986	18.255587331754
1987	21.433355178564728
1988	22.458680970343902
1989	25.629602576517936
1990	18.479507862761814
1991	17.80553659171299
1992	17.738523778892983
1993	18.531660537460304
1994	18.242207281013037
1995	16.78476284946636
1996	16.618441854804225
1997	16.542435109385863
1998	16.812951882136137
1999	16.18824884142421
2000	16.278873797443378
2001	15.853829381847472
2002	17.531860963679474
2003	17.905961242244505
2004	18.72541867422037
2005	18.164266125336837
2006	20.15324789731265
2007	20.59403544160911
2008	20.042713493929796
2009	18.188545203948788
2010	18.483717809914975
2011	18.943476629639065
2012	18.23544157463526
2013	17.587887717304618
2014	16.859333770292654
2015	16.273832495060937
2016	16.141863476812635
2017	16.362802698852704
2018	15.940558151678713
2019	15.97569233502382
2020	17.289627273621093
2021	18.765407569379494
2022	17.418952847394827
2023	16.82649033902324