Year Number 1996 64.6739120483398 1998 61.4130439758301 2000 63.5869560241699 2002 63.2432441711426 2003 65.9459457397461 2004 32.3383102416992 2005 58.3333320617676 2006 53.9215698242188 2007 38.3495140075684 2008 23.3009700775146 2009 24.8803825378418 2010 26.3157901763916 2011 25.5924167633057 2012 24.1706161499023 2013 22.748815536499 2014 22.5961532592773 2015 20 2016 14.7619047164917 2017 16.1904754638672 2018 11.9047622680664 2019 11.4285717010498 2020 10.4761905670166 2021 11.4285717010498 2022 11.7924528121948