Year % 2001 2.742576 2004 23.24274 2005 24.72119 2006 23.04587 2007 21.522 2008 38.10027 2009 38.74101 2010 22.62343 2011 33.75282 2012 20.73593 2013 11.66492 2014 14.62945 2015 14.5476 2016 13.30618 2017 10.11171 2018 16.5895 2019 16.81824 2020 17.36391 2021 18.84219