Year Number 1996 39.6984939575195 1998 43 2000 40.7960205078125 2002 42.7860679626465 2003 42.7860679626465 2004 56.25 2005 58.8516731262207 2006 62.6794242858887 2007 59.3301429748535 2008 55.769229888916 2009 47.8672981262207 2010 46.445499420166 2011 48.8262901306152 2012 50.7042236328125 2013 52.1126747131348 2014 36.0576934814453 2015 34.761905670166 2016 45.238094329834 2017 54.761905670166 2018 54.2857131958008 2019 60.476188659668 2020 64.2857131958008 2021 58.0952377319336 2022 54.2452812194824