Year | Value | 2022 | 68.849595895035 | 2021 | 68.630527599748 | 2020 | 68.376205542771 | 2019 | 69.12173666358 | 2018 | 68.714558106876 | 2017 | 68.687895096311 | 2016 | 68.701915531738 | 2015 | 68.977754395829 | 2014 | 69.247046562926 | 2013 | 69.130617017216 | 2012 | 69.486682117622 | 2011 | 69.358935997166 | 2010 | 68.604326024844 | 2009 | 69.066376827764 | 2008 | 70.199996721626 | 2007 | 70.981631721791 | 2006 | 70.178201237643 | 2005 | 70.391861699025 | 2004 | 69.828561632705 | 2003 | 69.558417427302 | 2002 | 69.447335031711 | 2001 | 68.469902544306 | 2000 | 68.243601655632 | 1999 | 67.945535446455 | 1998 | 68.148835224161 | 1997 | 67.816256066874 | 1996 | 67.389521514181 | 1995 | 67.43519035135 | 1994 | 66.461368036717 | 1993 | 66.188151189674 | 1992 | 65.500424699024 | 1991 | 65.640479794464 |
|