Year % (national estimate) 1990 58.133 1991 51.064 1992 41.896 1993 37.654 1994 35.093 1995 30.001 1996 28.638 1997 34.364 1998 34.41 1999 47.173 2000 47.02 2001 47.875 2002 45.396 2003 44.727 2004 43.452 2005 43.47 2006 44.527 2007 44.158 2008 44.271 2009 37.787 2010 37.446 2011 39.648 2012 40.712 2013 39.082 2014 39.425 2015 38.235 2016 39.978 2017 41.023 2018 42.309 2019 43.319 2020 40.371 2021 43.659 2022 45.649 2023 43.938