Year Number 1996 59.1397857666016 1998 55.0802154541016 2000 54.2553176879883 2002 45.5026473999023 2003 44.4444427490234 2004 55.1724128723145 2005 39.5121955871582 2006 45.365852355957 2007 53.8834953308105 2008 39.3203887939453 2009 55.0239219665527 2010 54.2857131958008 2011 39.8104248046875 2012 49.7630348205566 2013 49.7630348205566 2014 48.5576934814453 2015 37.6190490722656 2016 50.9523811340332 2017 54.761905670166 2018 48.5714302062988 2019 40.9523811340332 2020 30.4761905670166 2021 25.238094329834 2022 25