Year % 1995 0 1996 0 1997 0.036075 1998 0 1999 0 2000 0 2001 0 2002 0.0311656 2004 0.0668771 2005 0.016457 2006 4.349805 2007 3.889846 2008 4.540936 2009 4.144089 2010 3.655422 2011 3.772721 2012 3.40948 2013 4.15257 2014 0 2015 3.956808 2016 4.114645 2017 0 2018 0 2019 0 2020 0 2021 0