Year % 1995 0 2000 6.2 2001 6.21 2002 8.28 2003 6.71 2006 4.62 2007 4.56 2008 4.8 2009 4.54 2010 4.78 2011 4.5 2012 4.8 2013 4.8 2014 4.68 2015 4.94 2016 4.29 2017 3.57 2018 3.62 2019 15.7 2020 3.51 2021 4.48