Year % 1995 0 2000 2.94 2001 3.59 2002 7.17 2003 2.9 2006 1.88 2007 2.05 2008 3.34 2009 3.18 2010 3.95 2011 4.14 2012 4.29 2013 4.29 2014 3.92 2015 6.19 2016 5.51 2017 5.11 2018 4.62 2019 4.72 2020 5.04 2021 5.93