Year % 2001 0.65 2002 0.71 2003 0.82 2004 0.9 2005 0.66 2007 0.95 2008 0.78 2009 0.91 2010 0.99 2011 0.8 2012 1.31 2013 1.11 2014 1.39 2015 1.31 2017 0.79 2018 1.18 2019 1.75 2020 1.79 2021 1.48