Year	% of population
2008	86.9984080831547
2009	86.9949617037533
2010	86.9915213764756
2011	86.9880777918652
2012	86.9846370444798
2013	86.9811913535732
2014	86.9777497248258
2015	86.9770836901593
2016	86.979418604362