Year	% of GDP
1997	6.053873636055808
1998	6.548788474132286
1999	6.200060620521981
2011	4.0092613883320425
2012	4.137731738216395
2013	3.90972548785967
2014	3.792108857392757
2015	4.14789859152812
2016	4.3182811248236135
2017	4.015287340061261
2018	3.9182499132893485
2019	4.259323721665677
2020	5.2591716475336145
2021	4.336772116550881
2022	3.8423613857389105