| Year | Value | | 2023 | 0.94786727428436 | | 2022 | 1.4150943756104 | | 2021 | 0.94339621067047 | | 2020 | 0.94339621067047 | | 2016 | 0.47619047760963 | | 2015 | 0.47619047760963 | | 2014 | 0.95238095521927 | | 2013 | 1.8957345485687 | | 2012 | 1.4218009710312 | | 2011 | 1.8957345485687 | | 2010 | 1.8957345485687 | | 2009 | 1.8957345485687 | | 2008 | 2.8846154212952 | | 2007 | 8.6956520080566 | | 2006 | 12.07729434967 | | 2005 | 9.2233009338379 | | 2004 | 6.31067943573 | | 2003 | 9.5477390289307 | | 2002 | 13.756613731384 | | 2000 | 14.285714149475 | | 1998 | 13.297872543335 | | 1996 | 9.5744676589966 |
|