Year % 1989 6.75 1993 3.94 1995 6.57 1996 5.34 1997 1.58 1998 0.96 1999 0.87 2000 0.9 2001 1.05 2002 1 2003 1.01 2004 1 2005 1.02 2006 1.06 2007 1.12 2008 1.16 2009 1.23 2010 1.04 2011 1.01 2012 0.97 2013 0.99 2014 0.96 2015 1.12 2016 0.97 2017 0.97 2018 0.94 2019 0.83 2020 0.88 2021 1.77