Year | Value | 2022 | 12,708 | 2021 | 13,451 | 2020 | 14,605 | 2019 | 15,826 | 2018 | 16,960 | 2017 | 17,822 | 2016 | 18,343 | 2015 | 18,618 | 2014 | 18,709 | 2013 | 18,900 | 2012 | 19,465 | 2011 | 20,314 | 2010 | 21,398 | 2009 | 22,836 | 2008 | 24,236 | 2007 | 25,094 | 2006 | 25,565 | 2005 | 25,477 | 2004 | 24,344 | 2003 | 22,422 | 2002 | 20,258 | 2001 | 18,428 | 2000 | 17,313 | 1999 | 16,618 | 1998 | 15,928 | 1997 | 14,978 | 1996 | 13,939 | 1995 | 13,061 | 1994 | 12,395 | 1993 | 12,170 | 1992 | 12,518 | 1991 | 13,448 | 1990 | 14,663 | 1989 | 15,557 | 1988 | 15,844 | 1987 | 15,598 | 1986 | 15,014 | 1985 | 14,387 | 1984 | 13,983 | 1983 | 13,835 | 1982 | 13,787 | 1981 | 13,805 | 1980 | 14,318 | 1979 | 15,211 | 1978 | 16,007 | 1977 | 16,682 | 1976 | 17,254 | 1975 | 17,776 | 1974 | 18,286 | 1973 | 18,768 | 1972 | 19,131 | 1971 | 19,216 | 1970 | 18,240 | 1969 | 16,300 | 1968 | 14,365 | 1967 | 12,655 | 1966 | 11,242 | 1965 | 10,063 | 1964 | 9,041 | 1963 | 8,111 | 1962 | 7,174 | 1961 | 6,285 | 1960 | 5,692 |
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