Year | Value | 2022 | 23,665 | 2021 | 24,044 | 2020 | 25,251 | 2019 | 26,568 | 2018 | 27,835 | 2017 | 28,772 | 2016 | 29,094 | 2015 | 28,757 | 2014 | 27,927 | 2013 | 26,822 | 2012 | 25,703 | 2011 | 24,903 | 2010 | 24,744 | 2009 | 25,121 | 2008 | 25,603 | 2007 | 25,856 | 2006 | 25,696 | 2005 | 25,059 | 2004 | 23,952 | 2003 | 22,442 | 2002 | 20,755 | 2001 | 19,271 | 2000 | 18,069 | 1999 | 16,955 | 1998 | 15,901 | 1997 | 14,938 | 1996 | 14,121 | 1995 | 13,784 | 1994 | 14,227 | 1993 | 15,352 | 1992 | 16,928 | 1991 | 18,606 | 1990 | 20,044 | 1989 | 20,994 | 1988 | 21,348 | 1987 | 21,395 | 1986 | 21,454 | 1985 | 21,699 | 1984 | 22,061 | 1983 | 22,290 | 1982 | 22,201 | 1981 | 21,764 | 1980 | 21,044 | 1979 | 20,131 | 1978 | 19,019 | 1977 | 17,794 | 1976 | 16,773 | 1975 | 16,062 | 1974 | 15,558 | 1973 | 15,319 | 1972 | 15,355 | 1971 | 15,430 | 1970 | 15,426 | 1969 | 15,384 | 1968 | 15,278 | 1967 | 15,081 | 1966 | 14,900 | 1965 | 14,764 | 1964 | 14,612 | 1963 | 14,445 | 1962 | 14,322 | 1961 | 14,215 | 1960 | 14,081 |
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