Year % of population 2000 8.60566700510411 2001 9.00424752605042 2002 9.42522879725803 2003 9.87676965998667 2004 10.3400677635835 2005 10.814694218731 2006 11.3007400084745 2007 11.7983015321379 2008 12.3071178648893 2009 12.8267358396861 2010 13.3574318576564 2011 13.8991204082012 2012 14.4517136045026 2013 15.0147440721455 2014 15.5894570732653 2015 16.17540036159 2016 16.7724928532971 2017 17.3806539321045 2018 17.9998030901084 2019 18.6298545928192 2020 19.2707223290055 2021 19.3816144059671 2022 19.4935017104267