Year % (national estimate) 2005 12.656 2006 14.241 2007 15.044 2008 15.511 2009 15.709 2010 14.506 2011 14.436 2012 15.461 2013 16.21 2014 15.224 2015 17.286 2016 16.208 2017 17.458 2018 17.363 2019 20.732 2020 19.813 2021 17.898 2022 19.149