Year	% of population
2006	2.05009440844941
2007	1.98427707968873
2008	1.91838344227047
2009	1.85248181712441
2010	1.78657754198539
2011	1.72159415504767
2012	1.65709974120879
2013	1.59264492720672
2014	1.52803306285811