Year Number 1996 4.78723382949829 1998 8.51063823699951 2000 5.8201060295105 2002 7.93650770187378 2003 0.502512574195862 2004 0 2005 0.485436886548996 2006 0 2007 0.483091801404953 2008 1.92307686805725 2009 2.36966824531555 2010 2.36966824531555 2011 4.26540279388428 2012 4.7393364906311 2013 4.26540279388428 2014 2.38095235824585 2015 2.85714292526245 2016 3.33333325386047 2017 3.33333325386047 2018 1.41509437561035 2019 1.41509437561035 2020 1.88679242134094 2021 1.88679242134094 2022 2.35849046707153