Year % 1995 0 2000 2.54 2001 2.98 2002 6.34 2003 6.19 2006 6.19 2007 5.66 2008 6.27 2009 7.42 2010 4.83 2011 3.8 2012 3.88 2013 3.88 2014 3.85 2015 7.22 2016 6.76 2017 8.08 2018 7.42 2019 71.38 2020 8.54 2021 11.35