Year	% of population
2007	66.5479973933099
2008	66.5592836806558
2009	66.5705063728057
2010	66.5817297277811
2011	66.5930156230977
2012	66.6052035598077
2013	66.6183584298634
2014	66.6324772163257
2015	66.6475046269235