Year % 1992 1.724435 1996 1.094127 1997 1.094127 1998 1.094127 1999 1.244149 2000 1.054036 2001 0.8849558 2002 0.8849558 2003 0.9251328 2004 1.218324 2005 1.412253 2006 1.261418 2007 1.59171 2008 0.413454 2009 0.0982125 2010 0.7562365 2011 0.0883913 2014 0 2016 0 2017 0 2018 0 2019 0 2020 0 2021 0