Year	% of GDP
2012	26.886012591768132
2013	27.956368119648207
2014	29.75152633030687
2015	28.584921101287925
2016	28.80038119641094
2017	30.143948479654625
2018	30.88912543595551
2019	33.26237941786933
2020	32.53459160614139
2021	33.46799679817967