Year	% of GDP
1990	22.757070707070707
1991	21.871694417238004
1992	21.59256686349427
1993	21.402180376610506
1994	21.490030301896674
1995	22.206142408603704
1996	21.207820032137118
2004	22.349214804713302
2005	21.536011904761903
2006	23.386279249676097
2007	19.20966984246595
2008	22.71362931181659
2009	21.74935566047983
2010	21.8225644213838
2011	22.917093317277363
2012	22.892576135079327
2013	23.47566274606535
2014	22.64375609275691
2015	23.61570562651898
2016	23.5346235421212
2017	24.669942067799013
2018	23.99335341655294
2019	22.892848928612775
2020	19.452235217077384
2021	15.874209811768058