Year	% of GDP
1988	23.47813362172763
1989	24.494096800088176
1990	23.486485028099437
1991	23.08286447671693
1992	23.468068202923337
1993	21.32871350328171
1994	21.10316755397083
1995	21.74404001256251
1996	20.109199571952722
1997	19.914094207737755
1998	20.85185728661901
1999	21.89223451413301
2000	22.494662535331667
2001	21.414813015371593
2002	21.85901019243234
2003	24.07110007162403
2004	24.167497305917664
2005	23.215972844992546
2006	24.014389942575633
2007	24.78654642836302
2008	24.684756616974987
2009	24.95597020473718
2010	24.27817172655257
2011	23.364368298024026
2012	24.332893031300653
2013	24.009292197310796
2014	24.053230430578317
2015	24.815309256368558
2016	26.026684246649896
2017	26.22100376079049
2018	26.781066569950195
2019	27.453941745080417
2020	25.70946569572908