Year	% of GDP
1981	14.986373619840995
1982	15.28453816716325
1983	14.692637510365902
1984	15.869530693502728
1985	17.027591769376386
1986	18.938654910796256
1987	19.34460923775611
1988	20.256826147819098
1989	19.722637375465784
1990	19.409535544416613
1991	20.181510160387774
1992	16.330424621743603
1993	16.534454547458886
1994	16.719763950185737
1995	17.718225673093553
1996	18.75118324459706
1997	19.42195560704644
1998	20.32154329559582
1999	16.19469392731776
2000	15.279331520024817
2001	16.295617982848956
2002	19.580218642789557
2003	17.135604832744054
2004	15.020376132646735
2005	14.884898608052918
2006	15.05898763864429
2007	15.587821815387027
2008	16.86837729457918
2009	17.188072241206967
2010	15.574596275270977
2011	14.515853436747092
2012	15.040626324303224
2013	15.088775336925709
2014	15.432004587477316
2015	16.261921794455237
2016	16.422833835656952
2017	15.906582121111995
2018	15.603852855983957
2019	16.23879642159582
2020	18.17564785894959
2021	16.977400151432885
2022	17.282466458077707
2023	17.223483019082416