Year % 1995 2.71 1997 2.67 2002 1.73 2006 0.85 2007 1.57 2008 1.19 2009 1.28 2010 2.46 2011 1.05 2012 1.07 2013 1.68 2014 1.21 2015 0.99 2016 1.38 2017 1.08 2018 0.82 2019 11.62 2020 1.02 2021 1.18