Year Percent 1992 42.96875 1993 42.77344 1994 42.57812 1995 42.48047 1996 42.38281 1997 42.28516 1998 42.1875 1999 41.11328 2000 41.60156 2001 41.52344 2002 41.46484 2003 42.36328 2004 42.37109 2005 42.12891 2006 42.16797 2007 41.97266 2008 41.60156 2009 41.5625 2010 41.875 2011 42.01172 2012 42.10938 2013 42.20703 2014 42.12891 2015 42.5 2016 43.14453 2017 43.51562 2018 43.18359 2019 43.28125 2020 43.78906 2021 44.19922