Year % 1992 0 1997 0 2001 0 2002 1.15375 2003 1.411986 2004 2.498116 2005 0.7661248 2006 0.7187063 2007 0.5427408 2008 1.327623 2009 0.5051355 2012 3.631025 2013 2.457945 2014 1.992813 2015 0.804829 2016 0.5831566 2017 0.5901881 2018 0.5901881 2019 0.8201764 2020 0.769582 2021 0.8237233