Year	% of population
2008	69.8746583373816
2009	71.1053849992867
2010	68.8680166357988
2012	66.1994586018129
2013	62.9173736252043
2014	66.3922446727888
2015	60.8616815500741
2016	64.8574963014078
2017	61.7915607931249
2018	55.0840446004387
2019	61.2379306171848