Year	% of population
2008	74.9609438805466
2009	73.8621730650482
2010	74.3501749869535
2012	77.2499941597326
2013	75.0525152264165
2014	75.3998783598712
2015	75.3699699019612
2016	76.3510113724682
2017	76.3917830084132
2018	73.3290201521615
2019	71.8700203074457