| Year | Value | | 2022 | 15,384 | | 2021 | 15,148 | | 2020 | 14,920 | | 2019 | 14,535 | | 2018 | 14,093 | | 2017 | 13,658 | | 2016 | 13,235 | | 2015 | 12,811 | | 2014 | 12,394 | | 2013 | 11,992 | | 2012 | 11,595 | | 2011 | 11,203 | | 2010 | 10,769 | | 2009 | 10,298 | | 2008 | 9,848 | | 2007 | 9,409 | | 2006 | 8,983 | | 2005 | 8,565 | | 2004 | 8,144 | | 2003 | 7,715 | | 2002 | 7,270 | | 2001 | 6,805 | | 2000 | 6,385 | | 1999 | 6,023 | | 1998 | 5,663 | | 1997 | 5,309 | | 1996 | 4,967 | | 1995 | 4,644 | | 1994 | 4,348 | | 1993 | 4,080 | | 1992 | 3,844 | | 1991 | 3,687 | | 1990 | 3,776 | | 1989 | 3,855 | | 1988 | 3,685 | | 1987 | 3,455 | | 1986 | 3,215 | | 1985 | 2,955 | | 1984 | 2,665 | | 1983 | 2,337 | | 1982 | 1,961 | | 1981 | 1,535 | | 1980 | 1,327 | | 1979 | 1,369 | | 1978 | 1,428 | | 1977 | 1,506 | | 1976 | 1,602 | | 1975 | 1,711 | | 1974 | 1,840 | | 1973 | 1,991 | | 1972 | 2,163 | | 1971 | 2,234 | | 1970 | 2,186 | | 1969 | 2,121 | | 1968 | 2,039 | | 1967 | 1,935 | | 1966 | 1,819 | | 1965 | 1,686 | | 1964 | 1,528 | | 1963 | 1,362 | | 1962 | 1,206 | | 1961 | 1,061 | | 1960 | 969 |
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