Year | Value | 2022 | 26,278 | 2021 | 26,783 | 2020 | 27,480 | 2019 | 27,929 | 2018 | 27,514 | 2017 | 27,089 | 2016 | 26,658 | 2015 | 26,209 | 2014 | 25,736 | 2013 | 25,278 | 2012 | 24,820 | 2011 | 24,186 | 2010 | 23,401 | 2009 | 22,468 | 2008 | 21,437 | 2007 | 20,547 | 2006 | 19,721 | 2005 | 18,902 | 2004 | 18,141 | 2003 | 17,459 | 2002 | 16,890 | 2001 | 16,395 | 2000 | 16,004 | 1999 | 15,802 | 1998 | 15,946 | 1997 | 16,534 | 1996 | 17,440 | 1995 | 18,318 | 1994 | 19,044 | 1993 | 19,722 | 1992 | 20,310 | 1991 | 20,529 | 1990 | 20,246 | 1989 | 19,774 | 1988 | 19,080 | 1987 | 18,169 | 1986 | 17,077 | 1985 | 15,617 | 1984 | 14,548 | 1983 | 14,014 | 1982 | 13,452 | 1981 | 12,852 | 1980 | 12,183 | 1979 | 11,470 | 1978 | 10,764 | 1977 | 10,122 | 1976 | 9,586 | 1975 | 9,186 | 1974 | 8,940 | 1973 | 8,890 | 1972 | 8,945 | 1971 | 8,944 | 1970 | 8,820 | 1969 | 8,547 | 1968 | 8,105 | 1967 | 7,534 | 1966 | 6,965 | 1965 | 6,482 | 1964 | 6,063 | 1963 | 5,700 | 1962 | 5,408 | 1961 | 5,142 | 1960 | 4,875 |
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