Year	% of population
2000	63.23492180380399
2001	63.65278223135935
2002	64.17433325830831
2003	64.7233746576972
2004	66.17371880278556
2005	67.68532909941163
2006	69.24970512757544
2007	70.73929704734023
2008	72.21540840168096
2009	73.68106965667393
2010	75.12205059144233
2011	76.53273705518646
2012	77.92530761453239
2013	78.57696170597202