Year % 1992 1.528972 1997 0 2001 0.4614573 2002 0.6319051 2003 0.0720669 2004 0.1843968 2005 0.1891869 2006 0.1996403 2007 0.2582796 2008 0.3629273 2009 0.3873098 2012 0.0229234 2013 0.0014446 2014 0.0014428 2015 0.3301887 2016 0.4568636 2017 0.362954 2018 0.362954 2019 0.2527966 2020 0.2392464 2021 0.2809955