Year % 1992 5.77 1995 6.86 1996 7.12 1997 7.11 1998 9.97 1999 8.2 2000 2.52 2001 2.75 2002 6.71 2004 1.41 2005 1.21 2006 1.2 2007 1.3 2008 0.69 2009 1.08 2010 1.42 2011 1.41 2012 1.12 2013 1.57 2014 1.57 2015 1.59 2016 2.21 2017 2.8 2018 1.73 2019 1.73 2020 1.91 2021 1.91