Year | Value | 2023 | 10.131 | 2022 | 10.257 | 2021 | 10.378 | 2020 | 10.494 | 2019 | 10.606 | 2018 | 10.713 | 2017 | 10.814 | 2016 | 10.91 | 2015 | 11.001 | 2014 | 11.085 | 2013 | 11.165 | 2012 | 11.238 | 2011 | 11.305 | 2010 | 11.366 | 2009 | 11.421 | 2008 | 11.47 | 2007 | 11.512 | 2006 | 11.548 | 2005 | 11.578 | 2004 | 11.601 | 2003 | 11.617 | 2002 | 11.627 | 2001 | 11.631 | 2000 | 11.628 | 1999 | 11.624 | 1998 | 11.621 | 1997 | 11.618 | 1996 | 11.615 | 1995 | 11.612 | 1994 | 11.608 | 1993 | 11.605 | 1992 | 11.602 | 1991 | 11.671 | 1990 | 11.86 | 1989 | 12.051 | 1988 | 12.246 | 1987 | 12.443 | 1986 | 12.643 | 1985 | 12.845 | 1984 | 13.05 | 1983 | 13.258 | 1982 | 13.469 | 1981 | 13.683 | 1980 | 13.899 | 1979 | 14.118 | 1978 | 14.341 | 1977 | 14.566 | 1976 | 14.794 | 1975 | 15.025 | 1974 | 15.259 |
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