| Year | Value | | 2022 | 25,264 | | 2021 | 24,323 | | 2020 | 23,364 | | 2019 | 22,372 | | 2018 | 21,467 | | 2017 | 20,649 | | 2016 | 19,909 | | 2015 | 19,224 | | 2014 | 18,562 | | 2013 | 17,904 | | 2012 | 17,231 | | 2011 | 16,527 | | 2010 | 15,783 | | 2009 | 15,022 | | 2008 | 14,277 | | 2007 | 13,561 | | 2006 | 12,891 | | 2005 | 12,277 | | 2004 | 11,716 | | 2003 | 11,187 | | 2002 | 10,682 | | 2001 | 10,191 | | 2000 | 9,729 | | 1999 | 9,285 | | 1998 | 8,831 | | 1997 | 8,358 | | 1996 | 7,865 | | 1995 | 7,358 | | 1994 | 6,846 | | 1993 | 6,342 | | 1992 | 5,857 | | 1991 | 5,412 | | 1990 | 5,060 | | 1989 | 4,725 | | 1988 | 4,340 | | 1987 | 3,973 | | 1986 | 3,640 | | 1985 | 3,337 | | 1984 | 3,057 | | 1983 | 2,791 | | 1982 | 2,532 | | 1981 | 2,264 | | 1980 | 2,087 | | 1979 | 2,014 | | 1978 | 1,943 | | 1977 | 1,870 | | 1976 | 1,817 | | 1975 | 1,808 | | 1974 | 1,838 | | 1973 | 1,894 | | 1972 | 1,977 | | 1971 | 2,041 | | 1970 | 2,068 | | 1969 | 2,083 | | 1968 | 2,088 | | 1967 | 2,079 | | 1966 | 2,063 | | 1965 | 2,040 | | 1964 | 2,005 | | 1963 | 1,962 | | 1962 | 1,911 | | 1961 | 1,852 | | 1960 | 1,789 |
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