Year % 1996 20.2027 1999 19.7422 2000 3.75 2001 0.352399 2002 0.3287671 2003 0.367165 2006 0.506937 2007 0.5709625 2008 0.5762815 2009 0 2010 0.3644519 2011 0.38305 2012 3.227326 2013 3.227326 2014 0 2015 0 2016 0 2017 0 2018 0 2019 0 2020 0