Year % of population 2000 28.602555532408488 2001 28.161602945543144 2002 27.671238978229855 2003 27.149259176027503 2004 26.63286141588923 2005 26.01469210250723 2006 25.42098737472101 2007 24.88023849527312 2008 24.267754695169465 2009 23.635718785868807 2010 23.0065386770725 2011 23.030083750850693 2012 22.404599549831545 2013 21.78189197657137 2014 21.152682049531588 2015 20.52565706553467 2016 19.898883831852977 2017 19.09345169228172 2018 18.51055177363821 2019 17.96312587679386 2020 17.42083286392466 2021 16.96494289049917 2022 16.59132706308662