Year	% of people ages 15 and above
1976	9.43381023406982
1998	19.0449695587158
2003	24
2006	26.176549911499
2010	31.0997505187988
2011	30.6186695098877
2015	33.0688896179199
2018	35.4737701416016
2020	30.7614097595215