Year	% of population
2000	66.7294510003039
2001	68.2932872224526
2002	69.868591230061
2003	71.455033212042
2004	73.052544838339
2005	74.6608074174548
2006	76.2797368630873
2007	77.9088971640432
2008	79.5483307974886
2009	81.1977086068543
2010	82.8568325268669
2011	84.5254998174042
2012	86.2035024227267
2013	87.8905508121517
2014	89.5866002176512
2015	89.6149362125534
2016	89.6434846189584
2017	89.6721692709059
2018	89.7010626007435