Year % (national estimate) 2004 52.69 2007 51.505 2009 54.966 2010 53.455 2011 50.511 2012 49.205 2013 50.949 2014 51.211 2015 51.244 2016 49.358 2017 48.974 2018 49.351 2019 51.164 2020 46.051 2021 40.279 2022 39.407