Year Number 1996 34.4262313842773 1998 23.4972686767578 2000 26.2295074462891 2002 15.6756753921509 2003 17.2972965240479 2004 12.4378108978271 2005 18.1372547149658 2006 14.1463413238525 2007 15.0485439300537 2008 11.6504850387573 2009 16.2679424285889 2010 12.9186601638794 2011 12.3222751617432 2012 13.7440757751465 2013 13.2701425552368 2014 12.0192308425903 2015 10.9523811340332 2016 8.09523773193359 2017 6.66666650772095 2018 4.2857141494751 2019 4.2857141494751 2020 1.90476191043854 2021 1.90476191043854 2022 5.18867921829224