Year	% of GDP
1991	16.809502685254227
1992	16.490248526640155
1993	16.45634063019488
1994	17.242352766891248
1995	17.680347755539223
1996	16.08171797795515
1997	12.105600933488915
1998	14.76436531734133
1999	13.951701800614844
2010	14.776411638805667
2011	16.720493528363196
2012	15.97322287511832
2013	14.545369656582304
2014	15.72264962316598
2015	13.957699077385577
2016	14.867478755778162
2017	17.708122131029185
2019	16.565457956876468
2020	17.67780438053588
2021	17.55228353937355