Year	% of population
2009	89.2288428912487
2010	89.2363869223163
2011	89.2444478924505
2012	89.2530419349677
2013	89.2621886919014
2014	89.2718589344632
2015	89.282055453579
2016	89.2927751355984
2017	89.3040211833348