Year | Value | 2022 | 55,107 | 2021 | 49,963 | 2020 | 44,565 | 2019 | 39,224 | 2018 | 34,469 | 2017 | 31,194 | 2016 | 29,993 | 2015 | 30,883 | 2014 | 33,402 | 2013 | 36,601 | 2012 | 39,306 | 2011 | 40,699 | 2010 | 40,612 | 2009 | 39,433 | 2008 | 37,715 | 2007 | 36,055 | 2006 | 34,999 | 2005 | 34,771 | 2004 | 35,209 | 2003 | 35,966 | 2002 | 36,580 | 2001 | 36,671 | 2000 | 36,153 | 1999 | 35,064 | 1998 | 33,568 | 1997 | 31,904 | 1996 | 30,188 | 1995 | 28,472 | 1994 | 26,873 | 1993 | 25,457 | 1992 | 24,213 | 1991 | 23,234 | 1990 | 22,599 | 1989 | 22,307 | 1988 | 22,520 | 1987 | 23,368 | 1986 | 24,542 | 1985 | 25,499 | 1984 | 25,931 | 1983 | 25,645 | 1982 | 24,717 | 1981 | 23,620 | 1980 | 22,765 | 1979 | 22,152 | 1978 | 21,749 | 1977 | 21,544 | 1976 | 21,244 | 1975 | 20,623 | 1974 | 19,742 | 1973 | 18,688 | 1972 | 17,477 | 1971 | 16,278 | 1970 | 15,205 | 1969 | 14,223 | 1968 | 13,293 | 1967 | 12,496 | 1966 | 11,964 | 1965 | 11,783 | 1964 | 11,965 | 1963 | 12,569 | 1962 | 13,448 | 1961 | 14,213 | 1960 | 14,608 |
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