Year | Value | 2022 | 22,503 | 2021 | 22,325 | 2020 | 22,281 | 2019 | 23,091 | 2018 | 23,076 | 2017 | 22,556 | 2016 | 23,186 | 2015 | 23,764 | 2014 | 24,247 | 2013 | 24,618 | 2012 | 24,809 | 2011 | 24,961 | 2010 | 25,194 | 2009 | 25,423 | 2008 | 25,673 | 2007 | 25,920 | 2006 | 26,148 | 2005 | 26,339 | 2004 | 26,484 | 2003 | 26,578 | 2002 | 26,604 | 2001 | 26,565 | 2000 | 26,470 | 1999 | 26,307 | 1998 | 26,067 | 1997 | 25,734 | 1996 | 25,292 | 1995 | 24,742 | 1994 | 24,113 | 1993 | 23,451 | 1992 | 22,826 | 1991 | 22,243 | 1990 | 21,865 | 1989 | 21,643 | 1988 | 21,315 | 1987 | 20,837 | 1986 | 20,195 | 1985 | 19,420 | 1984 | 18,560 | 1983 | 17,688 | 1982 | 16,889 | 1981 | 16,223 | 1980 | 15,777 | 1979 | 15,553 | 1978 | 15,470 | 1977 | 15,467 | 1976 | 15,492 | 1975 | 15,493 | 1974 | 15,439 | 1973 | 15,331 | 1972 | 15,195 | 1971 | 15,063 | 1970 | 14,995 | 1969 | 15,015 | 1968 | 15,093 | 1967 | 15,202 | 1966 | 15,303 | 1965 | 15,367 | 1964 | 15,362 | 1963 | 15,277 | 1962 | 15,117 | 1961 | 14,883 | 1960 | 14,505 |
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