| Year | Value | | 2022 | 43,741 | | 2021 | 43,161 | | 2020 | 42,130 | | 2019 | 40,494 | | 2018 | 38,410 | | 2017 | 36,369 | | 2016 | 34,456 | | 2015 | 32,654 | | 2014 | 30,944 | | 2013 | 29,375 | | 2012 | 27,931 | | 2011 | 26,584 | | 2010 | 25,326 | | 2009 | 24,138 | | 2008 | 23,025 | | 2007 | 21,980 | | 2006 | 21,028 | | 2005 | 20,179 | | 2004 | 19,418 | | 2003 | 18,738 | | 2002 | 18,128 | | 2001 | 17,541 | | 2000 | 16,935 | | 1999 | 16,319 | | 1998 | 15,689 | | 1997 | 15,042 | | 1996 | 14,401 | | 1995 | 13,762 | | 1994 | 13,136 | | 1993 | 12,545 | | 1992 | 11,984 | | 1991 | 11,437 | | 1990 | 10,885 | | 1989 | 10,333 | | 1988 | 9,792 | | 1987 | 9,264 | | 1986 | 8,760 | | 1985 | 8,284 | | 1984 | 7,837 | | 1983 | 7,416 | | 1982 | 7,009 | | 1981 | 6,594 | | 1980 | 6,159 | | 1979 | 5,706 | | 1978 | 5,225 | | 1977 | 4,736 | | 1976 | 4,297 | | 1975 | 3,938 | | 1974 | 3,652 | | 1973 | 3,450 | | 1972 | 3,321 | | 1971 | 3,196 | | 1970 | 3,035 | | 1969 | 2,836 | | 1968 | 2,596 | | 1967 | 2,319 | | 1966 | 2,056 | | 1965 | 1,845 | | 1964 | 1,686 | | 1963 | 1,586 | | 1962 | 1,540 | | 1961 | 1,508 | | 1960 | 1,464 |
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