Year	% of GDP
1998	9.879789825237388
1999	10.4317569074698
2000	10.605495695998203
2001	13.306700825959883
2002	12.099470741528576
2003	12.678297094565599
2004	12.654454860285178
2005	14.51081779833991
2006	15.670107731990656
2007	16.74489690948903
2008	17.060203292509154
2009	14.977030523326832
2010	15.812080711538211
2011	15.344033508547222
2012	16.18243582879574
2013	17.05473521847159
2014	16.7087952019765
2015	16.75268490940446
2016	17.35477561892786
2017	17.753751064506094
2018	18.12892353631799
2019	18.081450414677352
2020	18.390775079360175
2021	19.689675427656926