| Year | Value | | 2022 | 39,003 | | 2021 | 37,191 | | 2020 | 35,207 | | 2019 | 34,141 | | 2018 | 33,707 | | 2017 | 33,358 | | 2016 | 33,142 | | 2015 | 32,989 | | 2014 | 31,221 | | 2013 | 27,755 | | 2012 | 25,381 | | 2011 | 24,352 | | 2010 | 23,145 | | 2009 | 20,848 | | 2008 | 17,921 | | 2007 | 15,310 | | 2006 | 13,061 | | 2005 | 11,219 | | 2004 | 9,796 | | 2003 | 8,837 | | 2002 | 8,311 | | 2001 | 8,030 | | 2000 | 7,835 | | 1999 | 7,654 | | 1998 | 7,448 | | 1997 | 7,217 | | 1996 | 6,958 | | 1995 | 6,685 | | 1994 | 6,421 | | 1993 | 6,182 | | 1992 | 5,965 | | 1991 | 5,771 | | 1990 | 5,674 | | 1989 | 5,654 | | 1988 | 5,599 | | 1987 | 5,500 | | 1986 | 5,366 | | 1985 | 5,207 | | 1984 | 5,028 | | 1983 | 4,836 | | 1982 | 4,641 | | 1981 | 4,437 | | 1980 | 4,227 | | 1979 | 4,030 | | 1978 | 3,857 | | 1977 | 3,704 | | 1976 | 3,565 | | 1975 | 3,426 | | 1974 | 3,287 | | 1973 | 3,147 | | 1972 | 3,002 | | 1971 | 2,856 | | 1970 | 2,693 | | 1969 | 2,521 | | 1968 | 2,356 | | 1967 | 2,192 | | 1966 | 2,025 | | 1965 | 1,862 | | 1964 | 1,747 | | 1963 | 1,684 | | 1962 | 1,634 | | 1961 | 1,599 | | 1960 | 1,576 |
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