Year	% of GDP
2011	25.37193476190761
2012	26.303855013258516
2013	26.98329212650459
2014	28.95680397537485
2015	30.622037795101328
2016	29.490939391725064
2017	31.16514443016558
2018	32.43199048122354
2019	32.048500631985874
2020	29.386626629020665
2021	25.39681400529661