Year % 1993 0 2000 0 2001 0 2002 0 2003 0 2007 8.06939 2008 8.007514 2009 8.274361 2010 0 2013 0.3635562 2016 0.0865801 2017 0.0744325 2018 0 2019 0 2020 0 2021 0