Year % 1995 22.42591 1996 9.775793 1997 22.16307 1998 22.56184 1999 21.81339 2000 23.69574 2001 10.77566 2002 0 2003 0 2004 1.731105 2005 0 2006 0 2007 0 2008 21.14599 2009 0 2010 0 2011 0 2012 0 2013 0 2015 12.4617 2018 0 2020 0 2021 0.0536445