Year Number 1996 61 1998 64.1791076660156 2000 64.1791076660156 2002 64.6766204833984 2003 56.2189064025879 2004 52.8846168518066 2005 53.8461532592773 2006 55.769229888916 2007 53.8461532592773 2008 53.8461532592773 2009 54.502368927002 2010 53.554500579834 2011 55.8685455322266 2012 55.8685455322266 2013 54.9295768737793 2014 58.6206893920898 2015 57.1428565979004 2016 57.1428565979004 2017 56.6502456665039 2018 50.970874786377 2019 59.9033813476563 2020 57.487922668457 2021 57.9710159301758 2022 57.487922668457