Year	% of GDP
1988	24.445001870187323
1989	24.254695484345238
1990	22.64285616660319
1991	21.38459526753474
1992	20.106997105026785
1993	18.692105922400202
1994	19.098761198538828
1995	19.22652120569505
1996	23.400717916912605
1997	24.24797742863964
1998	26.38555254477507
1999	26.85046563081206
2000	24.74383103110654
2001	26.876088200452564
2002	29.981697569890876
2003	31.817213641622743
2004	30.254335986997738
2005	27.45346292033427
2006	28.623610671956918
2007	28.55338144963145
2008	31.094427211920667
2009	36.33136376687221
2010	28.901745665481993
2011	28.20107590702683
2012	27.510372203350364
2013	25.015985849831296
2014	25.680461851750724
2015	25.786469538349934
2016	26.201440335714587
2017	26.661600770438387
2018	26.55779471969036
2019	25.789937823933194
2020	29.82962048805498