Year	% of GDP
1995	18.610439883948583
1996	18.65661076123539
1997	20.71729622561972
1998	16.94955259468751
2008	32.61432549755951
2009	32.36929247054698
2010	30.796864411246915
2011	30.15348015245854
2012	30.033498114688427
2013	29.673025837776507
2014	29.132847965145853
2015	28.382854519140526
2016	28.31501918601397
2017	27.900146408668856
2018	28.722814846850813
2019	27.95918548891443
2020	27.54788986535709
2021	27.75783599376055
2022	27.05403925518199