Year % 1995 0 1996 0 1997 0 1998 0 1999 0 2000 0 2001 0 2002 4.93 2003 4.9 2004 5.07 2005 5.13 2006 5.03 2007 4.91 2008 5.07 2009 5.26 2010 5.51 2011 5.6 2012 5.64 2013 5.73 2014 5.72 2015 0 2016 0 2017 0 2018 0 2019 0 2020 0 2021 0