Year % 1999 0 2001 0 2002 0.0089898 2003 0.1261468 2004 0.1006489 2005 0.0553898 2006 0.0269526 2007 0.0058068 2008 0.0043791 2009 0.0031402 2010 0.0050161 2011 0.0060639 2012 0.0076747 2013 0.0037694 2015 0.0018789 2016 0.004682 2020 0.0010738 2021 0.0044524