Year % (national estimate) 2005 53.67 2006 40.7 2009 44.12 2010 40.48 2011 35.24 2012 28.26 2014 25.27 2015 28.01 2018 27.529 2019 25.947 2020 25.981 2021 26.335 2022 30.579 2023 30.974