| Year | Value | | 2022 | 141,800 | | 2021 | 133,424 | | 2020 | 124,265 | | 2019 | 114,718 | | 2018 | 105,292 | | 2017 | 97,048 | | 2016 | 90,112 | | 2015 | 84,128 | | 2014 | 78,566 | | 2013 | 73,028 | | 2012 | 67,163 | | 2011 | 60,769 | | 2010 | 54,088 | | 2009 | 47,660 | | 2008 | 42,269 | | 2007 | 39,003 | | 2006 | 38,563 | | 2005 | 40,817 | | 2004 | 44,979 | | 2003 | 49,791 | | 2002 | 53,913 | | 2001 | 56,520 | | 2000 | 57,699 | | 1999 | 58,828 | | 1998 | 59,892 | | 1997 | 60,112 | | 1996 | 59,957 | | 1995 | 60,545 | | 1994 | 62,427 | | 1993 | 64,796 | | 1992 | 67,121 | | 1991 | 67,955 | | 1990 | 67,036 | | 1989 | 65,016 | | 1988 | 62,149 | | 1987 | 58,943 | | 1986 | 55,546 | | 1985 | 52,063 | | 1984 | 48,530 | | 1983 | 45,126 | | 1982 | 42,159 | | 1981 | 40,125 | | 1980 | 39,204 | | 1979 | 39,344 | | 1978 | 40,239 | | 1977 | 41,416 | | 1976 | 42,238 | | 1975 | 42,212 | | 1974 | 41,444 | | 1973 | 40,359 | | 1972 | 39,118 | | 1971 | 37,935 | | 1970 | 37,151 | | 1969 | 36,638 | | 1968 | 36,335 | | 1967 | 36,184 | | 1966 | 35,992 | | 1965 | 35,690 | | 1964 | 35,177 | | 1963 | 34,366 | | 1962 | 33,257 | | 1961 | 31,782 | | 1960 | 29,884 |
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