Year	% of GDP
1976	22.252728372623807
1977	21.62662024737169
1978	21.988359279796274
1979	21.35194356726633
1980	21.203226781906164
1981	20.753650403717003
1982	20.137164141764007
1983	20.060349385308207
1984	19.69468676576757
1985	20.01729915456495
1986	20.008539267045485
1987	19.411395608565872
1988	19.5049655088822
1989	19.40399042259571
1990	19.58111474935393
1991	19.17173885269634
1992	18.479634993376184
1993	17.460206950465754
1994	17.356520113790328
1995	17.90587952182437
1996	17.6322092892288
1997	17.803534647677644
1998	17.726769003040083
1999	17.890932662541356
2000	18.214967074032586
2001	18.341092994955492
2002	17.72678280859939
2003	17.45317461049969
2004	17.336460348425856
2005	17.407818470000773
2006	17.82343620980086
2007	18.15364762273637
2008	17.41746572930439
2009	16.361995642193854
2010	16.478500735932656
2011	16.59560906109097
2012	16.706123374815444
2013	16.495729371906165
2014	16.56001525096784
2015	16.69003645780368
2016	17.047414633818963
2017	16.842707667686437
2018	16.828751707647925
2019	16.5918031548958
2020	16.17460660267838
2021	16.924819777800604
2022	15.908504861301983
2023	15.660951178105659