Year | Value | 2022 | 17,363 | 2021 | 17,383 | 2020 | 17,459 | 2019 | 17,540 | 2018 | 17,594 | 2017 | 17,598 | 2016 | 17,466 | 2015 | 17,208 | 2014 | 16,831 | 2013 | 16,263 | 2012 | 15,602 | 2011 | 15,058 | 2010 | 14,614 | 2009 | 14,388 | 2008 | 14,464 | 2007 | 14,575 | 2006 | 14,574 | 2005 | 14,507 | 2004 | 14,365 | 2003 | 14,094 | 2002 | 13,840 | 2001 | 13,726 | 2000 | 13,661 | 1999 | 13,710 | 1998 | 13,904 | 1997 | 14,054 | 1996 | 14,146 | 1995 | 14,247 | 1994 | 14,241 | 1993 | 14,159 | 1992 | 14,108 | 1991 | 14,020 | 1990 | 13,901 | 1989 | 13,924 | 1988 | 14,024 | 1987 | 14,017 | 1986 | 13,901 | 1985 | 13,655 | 1984 | 13,279 | 1983 | 12,760 | 1982 | 12,132 | 1981 | 11,470 | 1980 | 10,886 | 1979 | 10,366 | 1978 | 9,821 | 1977 | 9,271 | 1976 | 8,742 | 1975 | 8,254 | 1974 | 7,837 | 1973 | 7,524 | 1972 | 7,311 | 1971 | 7,161 | 1970 | 7,032 | 1969 | 6,901 | 1968 | 6,760 | 1967 | 6,608 | 1966 | 6,440 | 1965 | 6,255 | 1964 | 6,061 | 1963 | 5,852 | 1962 | 5,625 | 1961 | 5,388 | 1960 | 5,154 |
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