Year % 1995 0 1996 0.7007527 1997 0 1998 0 1999 0 2000 0 2001 0.5319149 2002 0.075643 2003 0.5109766 2004 0 2005 0 2006 0.6218905 2007 0 2008 2.079193 2009 0.5123279 2010 0.5407841 2011 0.3989172 2012 0 2013 0 2015 0 2018 0 2020 0 2021 0