Year | Value | 2022 | 25,615 | 2021 | 25,055 | 2020 | 24,790 | 2019 | 24,512 | 2018 | 23,968 | 2017 | 23,432 | 2016 | 22,734 | 2015 | 22,061 | 2014 | 21,394 | 2013 | 20,791 | 2012 | 20,301 | 2011 | 20,012 | 2010 | 19,801 | 2009 | 19,763 | 2008 | 19,854 | 2007 | 19,961 | 2006 | 20,060 | 2005 | 20,121 | 2004 | 20,300 | 2003 | 20,365 | 2002 | 20,200 | 2001 | 19,923 | 2000 | 19,407 | 1999 | 18,815 | 1998 | 18,324 | 1997 | 17,903 | 1996 | 17,547 | 1995 | 17,206 | 1994 | 16,952 | 1993 | 16,675 | 1992 | 16,313 | 1991 | 15,923 | 1990 | 15,564 | 1989 | 15,207 | 1988 | 14,953 | 1987 | 14,813 | 1986 | 14,674 | 1985 | 14,414 | 1984 | 14,034 | 1983 | 13,693 | 1982 | 13,416 | 1981 | 13,124 | 1980 | 12,842 | 1979 | 12,709 | 1978 | 12,647 | 1977 | 12,610 | 1976 | 12,683 | 1975 | 12,742 | 1974 | 12,586 | 1973 | 12,389 | 1972 | 12,238 | 1971 | 12,181 | 1970 | 12,401 | 1969 | 12,771 | 1968 | 13,088 | 1967 | 13,310 | 1966 | 13,298 | 1965 | 12,907 | 1964 | 12,198 | 1963 | 11,438 | 1962 | 10,687 | 1961 | 10,100 | 1960 | 9,848 |
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