Year % of population 2004 25.3500686 2005 27.1 2006 28.9 2007 30.8 2008 32.9 2009 35.1 2010 37.5 2011 35.61154125 2012 56.83878255 2013 60.31 2014 61 2015 68.11978601 2016 69.88164684 2017 71.27233254 2018 71.51710049 2019 73.47666575 2020 77.60879306 2021 82.21969752 2022 88.22192026