Year | Value | 2022 | 40,361 | 2021 | 39,801 | 2020 | 39,452 | 2019 | 39,444 | 2018 | 39,786 | 2017 | 40,175 | 2016 | 40,168 | 2015 | 39,752 | 2014 | 39,205 | 2013 | 38,525 | 2012 | 37,737 | 2011 | 36,901 | 2010 | 36,106 | 2009 | 35,435 | 2008 | 34,951 | 2007 | 34,667 | 2006 | 34,508 | 2005 | 34,365 | 2004 | 34,165 | 2003 | 33,570 | 2002 | 32,501 | 2001 | 31,386 | 2000 | 30,449 | 1999 | 29,726 | 1998 | 28,903 | 1997 | 27,885 | 1996 | 26,912 | 1995 | 26,017 | 1994 | 25,210 | 1993 | 24,498 | 1992 | 23,835 | 1991 | 23,160 | 1990 | 22,439 | 1989 | 21,663 | 1988 | 20,889 | 1987 | 20,165 | 1986 | 19,506 | 1985 | 18,925 | 1984 | 18,418 | 1983 | 17,975 | 1982 | 17,587 | 1981 | 17,190 | 1980 | 16,735 | 1979 | 16,262 | 1978 | 15,794 | 1977 | 15,318 | 1976 | 14,831 | 1975 | 14,334 | 1974 | 13,816 | 1973 | 13,271 | 1972 | 12,707 | 1971 | 12,117 | 1970 | 11,525 | 1969 | 10,868 | 1968 | 10,163 | 1967 | 9,575 | 1966 | 9,167 | 1965 | 8,894 | 1964 | 8,800 | 1963 | 8,872 | 1962 | 8,934 | 1961 | 8,942 | 1960 | 8,913 |
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