Year Number 1996 1.50753772258759 1998 1.5 2000 1.49253726005554 2002 0 2003 2.48756217956543 2004 4.32692289352417 2005 3.34928226470947 2006 8.13397121429443 2007 9.09090900421143 2008 9.13461494445801 2009 5.21327018737793 2010 7.10900497436523 2011 2.3474178314209 2012 2.81690144538879 2013 3.75586843490601 2014 2.4038462638855 2015 2.38095235824585 2016 0.952380955219269 2017 0.952380955219269 2018 0.476190477609634 2019 0.952380955219269 2020 0.952380955219269 2021 0.476190477609634 2022 0.471698105335236