Year	% of GDP
1991	15.142662979357993
1992	15.122783962781092
1993	14.928916309223561
1994	15.616054772723805
1995	16.678206578459065
1996	13.438996579247434
1997	11.420361726954493
1998	13.85429535232384
1999	13.165645586297762
2010	13.855957125155985
2011	15.531750991475896
2012	14.496155215104142
2013	13.48786653065689
2014	13.690026719647964
2015	13.128154891725616
2016	13.863385951892763
2017	14.368382415933587
2019	15.059394376986754
2020	15.787822766545034
2021	15.636245476257901