Year	% of population
2008	26.7194279236417
2009	30.8477665096278
2010	24.7550175433171
2011	26.4302908386429
2012	27.0405479116034
2014	27.900072122006
2015	29.5154637890644
2016	29.46956205594
2017	30.71363964534
2018	24.979907831882
2019	24.6413425967698
2020	25.5572475044299