Year Number 1996 60.7526893615723 1998 53.4759368896484 2000 58.5106391906738 2002 71.9576721191406 2003 60.3174591064453 2004 55.6650238037109 2005 61.9512176513672 2006 58.5365867614746 2007 58.2524261474609 2008 56.7961158752441 2009 56.9377975463867 2010 52.8571434020996 2011 52.1327018737793 2012 39.8104248046875 2013 35.5450248718262 2014 30.2884616851807 2015 29.5238094329834 2016 26.6666660308838 2017 18.0952377319336 2018 23.8095245361328 2019 23.3333339691162 2020 24.2857151031494 2021 27.1428565979004 2022 24.5283012390137