Year % 2001 0.14 2004 9.7 2005 47.07 2006 31.64 2007 15.64 2008 28.15 2009 19.26 2010 37.26 2011 49.63 2012 32.14 2013 0.92 2014 0.9 2015 2.35 2016 1.87 2017 1.6 2018 4.36 2019 13.74 2020 2.9 2021 4.19