Year	% of GDP
1996	2.37649011611938
2000	2.26385998725891
2004	2.60818004608154
2008	2.65296006202698
2012	2.8745698928833
2015	3.07832002639771
2017	3.07698011398315
2019	3.19679999351501
2021	3.35917997360229