Year % 1993 0 1994 0 1995 0 1996 0 1997 0 1998 0 1999 0 2000 0 2001 0 2002 3.79852 2003 0 2004 0 2005 0 2006 0 2007 0 2008 0 2009 15.26575 2010 12.26579 2011 17.47509 2012 12.00555 2013 18.20892 2014 18.55166 2015 18.43832 2016 18.43294 2017 20.10099 2018 12.20401 2019 12.20401 2020 12.0087 2021 11.9819