Year % of adults 2000 12.0622606445565 2005 10.5119389240826 2010 9.14576016719114 2011 8.90510928825876 2012 8.64962520707721 2013 8.38463813556755 2014 8.16489540655935 2015 7.95672587118918 2016 7.73743516128499