Year Number 1996 40.2173919677734 1998 37.5 2000 37.5 2002 27.5675678253174 2003 17.8378372192383 2004 14.9253730773926 2005 14.7058820724487 2006 10.2941179275513 2007 5.82524251937866 2008 5.82524251937866 2009 4.30622005462646 2010 3.82775115966797 2011 7.10900497436523 2012 6.63507127761841 2013 4.7393364906311 2014 2.88461542129517 2015 2.38095235824585 2016 2.38095235824585 2017 2.38095235824585 2018 0 2019 0.476190477609634 2020 0.476190477609634 2021 0.952380955219269 2022 2.35849046707153