Year	% of population
2005	79.6583002072512
2006	77.7384204160245
2007	74.8498870754815
2008	71.090456141968
2009	70.60611633739
2010	66.449090144786
2011	65.5334361976214
2012	64.4141259102048
2015	61.0839338858626
2016	61.7621031056298
2017	62.9333763671349