Year % (national estimate) 2000 35.977 2001 28.754 2002 26.045 2003 29.843 2004 29.349 2005 30.908 2006 31.285 2007 32.621 2008 30.354 2009 31.445 2010 31.431 2011 34.083 2012 33.675 2013 33.485 2014 33.473 2015 33.853 2016 33.291 2017 32.705 2018 32.043 2019 33.052 2020 30.336 2021 31.922 2022 34.004