Year	% of GDP
1991	18.016215348894278
1992	20.74379470323386
1993	24.543659693631362
1994	23.51906720373322
1995	19.925160000843782
1996	17.030786773090078
1997	18.26400233372229
1998	18.987756121939032
1999	18.06022178304787
2010	21.420229208007687
2011	19.999297756295896
2012	17.9381007754932
2013	17.016470420365167
2014	16.93740581407546
2015	18.603228408514713
2016	17.604481113867163
2017	17.69484788389132
2019	16.61890770196875
2020	17.67368864235526
2021	15.124044924796248