Year Number 1996 69.8924713134766 1998 62.5668449401855 2000 57.4468078613281 2002 46.0317459106445 2003 47.0899467468262 2004 42.8571434020996 2005 47.8048782348633 2006 39.0243911743164 2007 40.2912635803223 2008 40.2912635803223 2009 41.1483268737793 2010 34.761905670166 2011 39.3364944458008 2012 37.4407577514648 2013 35.0710906982422 2014 25.480770111084 2015 30.9523811340332 2016 32.8571434020996 2017 30 2018 29.5238094329834 2019 33.8095245361328 2020 38.0952377319336 2021 30.9523811340332 2022 26.8867931365967