| Year | Value | | 2022 | 66,216 | | 2021 | 64,159 | | 2020 | 62,181 | | 2019 | 60,187 | | 2018 | 58,269 | | 2017 | 56,471 | | 2016 | 54,679 | | 2015 | 52,809 | | 2014 | 50,927 | | 2013 | 49,014 | | 2012 | 47,051 | | 2011 | 45,193 | | 2010 | 43,572 | | 2009 | 42,227 | | 2008 | 41,021 | | 2007 | 39,957 | | 2006 | 38,970 | | 2005 | 38,036 | | 2004 | 37,163 | | 2003 | 36,284 | | 2002 | 35,399 | | 2001 | 34,561 | | 2000 | 33,771 | | 1999 | 33,001 | | 1998 | 32,241 | | 1997 | 31,490 | | 1996 | 30,638 | | 1995 | 29,636 | | 1994 | 28,490 | | 1993 | 28,552 | | 1992 | 28,900 | | 1991 | 28,224 | | 1990 | 27,544 | | 1989 | 26,857 | | 1988 | 26,162 | | 1987 | 25,473 | | 1986 | 24,818 | | 1985 | 24,201 | | 1984 | 23,590 | | 1983 | 22,998 | | 1982 | 22,432 | | 1981 | 21,873 | | 1980 | 21,321 | | 1979 | 20,789 | | 1978 | 20,258 | | 1977 | 19,706 | | 1976 | 19,153 | | 1975 | 18,632 | | 1974 | 18,137 | | 1973 | 17,648 | | 1972 | 17,171 | | 1971 | 16,686 | | 1970 | 16,173 | | 1969 | 15,635 | | 1968 | 15,088 | | 1967 | 14,566 | | 1966 | 14,118 | | 1965 | 13,777 | | 1964 | 13,562 | | 1963 | 13,456 | | 1962 | 13,408 | | 1961 | 13,383 | | 1960 | 13,361 |
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