Year	% of GDP
1991	16.074812341427634
1992	16.447073638107923
1993	16.95093425486917
1994	17.041532047882725
1995	20.699906666861274
1996	19.93639871083202
1997	20.07719136232709
1998	20.50457277702077
1999	21.185753371775053
2000	21.148340654069454
2001	20.879583180853967
2002	20.9865252963252
2003	21.428834084798243
2004	22.032571106735446
2005	22.28491691144161
2006	23.023516020461543
2007	24.05564649369341
2008	20.25711195084161
2009	16.479601396229118
2010	17.658013856893646
2011	18.28660416371633
2012	19.41195356824391
2013	17.999768618156143
2014	18.37517947381291
2015	16.60039314723003
2016	18.76557362507591
2017	17.27362248161313
2018	17.35665326446857
2019	17.57221430592483
2020	17.23219873919692