Year Number 2004 49.7512435913086 2005 71.0784301757813 2006 60.9756088256836 2007 57.7669906616211 2008 59.2233009338379 2009 62.2009582519531 2010 61.2440185546875 2011 62.5592422485352 2012 63.9810409545898 2013 66.8246459960938 2014 39.4230766296387 2015 33.8095245361328 2016 42.3809509277344 2017 42.3809509277344 2018 41.4285697937012 2019 39.0476188659668 2020 37.6190490722656 2021 36.6666679382324 2022 35.8490562438965