Year % 2001 2.279088 2002 5.108468 2004 1.886792 2005 2.522255 2006 3.604568 2007 4.251581 2008 3.869863 2009 4.336815 2010 3.943218 2011 3.874691 2012 5.769231 2013 1.552548 2014 0 2015 4.636747 2016 5 2017 1.435014 2018 1.248439 2019 1.512206 2020 1.047224 2021 0.8020415