Year % of population 2007 32.7242150398858 2008 38.9479417454274 2009 39.8543002496646 2010 49.7255812304964 2011 47.7547833419534 2012 61.985953497636 2013 59.9110916446565 2014 58.4356008084822 2015 63.3050749314749 2016 63.371590591193 2017 64.7301049071822 2018 65.0631405280939 2019 65.6295138239842 2020 76.5413496253069