Year | Value | 2021 | 40.40961941 | 2020 | 40.12946709 | 2019 | 39.85125701 | 2017 | 35.30405287 | 2016 | 33.35216255 | 2015 | 31.50108128 | 2014 | 29.65 | 2013 | 27.8 | 2012 | 25.974423 | 2011 | 22.8 | 2010 | 20 | 2009 | 15.35 | 2008 | 14.49 | 2007 | 13.62113273 | 2006 | 12.75033925 | 2005 | 11.8813691 | 2004 | 11.01786731 | 2003 | 9.2325021 | 2002 | 5.570099705 | 2001 | 4.660527199 | 2000 | 3.734862137 | 1999 | 2.797594069 | 1998 | 1.858718785 | 1997 | 0.570676845 | 1996 | 0.278037795 |
|