Year | Value | 2022 | 63,367 | 2021 | 59,098 | 2020 | 55,520 | 2019 | 52,538 | 2018 | 49,218 | 2017 | 45,967 | 2016 | 42,235 | 2015 | 37,068 | 2014 | 30,958 | 2013 | 25,608 | 2012 | 22,291 | 2011 | 21,936 | 2010 | 25,001 | 2009 | 30,643 | 2008 | 36,934 | 2007 | 41,919 | 2006 | 44,684 | 2005 | 45,427 | 2004 | 44,595 | 2003 | 42,901 | 2002 | 41,290 | 2001 | 40,208 | 2000 | 40,188 | 1999 | 41,593 | 1998 | 43,761 | 1997 | 45,685 | 1996 | 46,721 | 1995 | 46,337 | 1994 | 44,481 | 1993 | 41,587 | 1992 | 37,860 | 1991 | 33,814 | 1990 | 30,288 | 1989 | 27,209 | 1988 | 24,493 | 1987 | 22,450 | 1986 | 21,022 | 1985 | 20,218 | 1984 | 20,142 | 1983 | 20,880 | 1982 | 22,084 | 1981 | 23,190 | 1980 | 23,892 | 1979 | 24,154 | 1978 | 23,942 | 1977 | 23,369 | 1976 | 22,784 | 1975 | 22,468 | 1974 | 22,385 | 1973 | 22,473 | 1972 | 22,767 | 1971 | 23,016 | 1970 | 23,140 | 1969 | 23,146 | 1968 | 22,972 | 1967 | 22,687 | 1966 | 22,453 | 1965 | 22,334 | 1964 | 22,341 | 1963 | 22,358 | 1962 | 22,475 | 1961 | 22,799 | 1960 | 23,274 |
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