Year | Value | 2022 | 659.21607971714 | 2021 | 492.35691386424 | 2020 | 388.1731068488 | 2019 | 322.51984792587 | 2018 | 278.49138441874 | 2017 | 244.64900088741 | 2016 | 221.0275340762 | 2015 | 207.28819598149 | 2014 | 189.18524947727 | 2013 | 176.99056500687 | 2012 | 164.69750696942 | 2011 | 133.24995988233 | 2010 | 100 | 2009 | 92.46479936524 | 2008 | 85.23386191436 | 2007 | 59.04393093865 | 2006 | 50.361420225955 | 2005 | 44.845641208752 | 2004 | 40.779897189267 | 2003 | 39.46669406203 | 2002 | 34.719177972078 | 2001 | 34.486364285055 | 2000 | 37.582338939063 | 1999 | 37.335010136816 | 1998 | 34.588205556568 | 1997 | 34.281454520801 | 1996 | 33.479549151893 | 1995 | 36.583373542219 | 1994 | 33.250909727143 | 1993 | 30.904091350488 | 1992 | 29.846606398472 | 1991 | 27.003796808368 | 1990 | 19.896315838746 | 1989 | 18.921394534671 | 1988 | 17.549497462091 | 1987 | 16.389036447333 | 1986 | 16.796980080495 | 1985 | 18.623738873989 | 1984 | 15.64169833515 | 1983 | 14.427311985763 | 1982 | 14.52541344198 | 1981 | 13.717447411221 | 1980 | 12.924409862942 | 1979 | 12.369923371252 | 1978 | 10.660764460047 | 1977 | 9.326340925096 | 1976 | 7.9946593563035 | 1975 | 6.2196932570701 | 1974 | 5.83734130814 | 1973 | 5.3754723403248 | 1972 | 4.9355391018605 | 1971 | 5.255130491856 | 1970 | 5.2271015043607 | 1969 | 4.7466480991958 | 1968 | 4.6799269224603 | 1967 | 4.6713963610465 | 1966 | 4.6339228234181 | 1965 | 4.6979020340163 |
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