| Year | Value | | 2022 | 53,725 | | 2021 | 52,706 | | 2020 | 52,099 | | 2019 | 51,843 | | 2018 | 50,955 | | 2017 | 49,712 | | 2016 | 48,490 | | 2015 | 47,242 | | 2014 | 45,494 | | 2013 | 43,234 | | 2012 | 41,275 | | 2011 | 40,455 | | 2010 | 40,365 | | 2009 | 38,922 | | 2008 | 36,499 | | 2007 | 34,613 | | 2006 | 33,077 | | 2005 | 31,687 | | 2004 | 30,289 | | 2003 | 28,855 | | 2002 | 27,477 | | 2001 | 26,165 | | 2000 | 24,890 | | 1999 | 23,670 | | 1998 | 22,502 | | 1997 | 21,371 | | 1996 | 20,252 | | 1995 | 19,128 | | 1994 | 17,990 | | 1993 | 16,843 | | 1992 | 15,700 | | 1991 | 14,583 | | 1990 | 13,373 | | 1989 | 12,137 | | 1988 | 11,071 | | 1987 | 10,169 | | 1986 | 9,413 | | 1985 | 8,796 | | 1984 | 8,309 | | 1983 | 7,937 | | 1982 | 7,661 | | 1981 | 7,433 | | 1980 | 7,160 | | 1979 | 6,849 | | 1978 | 6,560 | | 1977 | 6,301 | | 1976 | 6,071 | | 1975 | 5,865 | | 1974 | 5,679 | | 1973 | 5,513 | | 1972 | 5,359 | | 1971 | 5,220 | | 1970 | 5,118 | | 1969 | 5,027 | | 1968 | 4,908 | | 1967 | 4,762 | | 1966 | 4,605 | | 1965 | 4,432 | | 1964 | 4,238 | | 1963 | 4,046 | | 1962 | 3,877 | | 1961 | 3,727 | | 1960 | 3,590 |
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