| Year | Value | | 2022 | 148,031 | | 2021 | 143,343 | | 2020 | 141,401 | | 2019 | 143,114 | | 2018 | 145,461 | | 2017 | 148,019 | | 2016 | 150,387 | | 2015 | 151,662 | | 2014 | 151,236 | | 2013 | 148,810 | | 2012 | 144,208 | | 2011 | 138,129 | | 2010 | 131,562 | | 2009 | 124,658 | | 2008 | 117,940 | | 2007 | 112,323 | | 2006 | 107,436 | | 2005 | 102,897 | | 2004 | 98,337 | | 2003 | 93,198 | | 2002 | 87,759 | | 2001 | 81,208 | | 2000 | 72,077 | | 1999 | 60,894 | | 1998 | 50,496 | | 1997 | 43,905 | | 1996 | 43,119 | | 1995 | 48,727 | | 1994 | 59,448 | | 1993 | 73,077 | | 1992 | 84,986 | | 1991 | 91,452 | | 1990 | 93,064 | | 1989 | 90,534 | | 1988 | 87,280 | | 1987 | 85,701 | | 1986 | 84,517 | | 1985 | 84,529 | | 1984 | 85,317 | | 1983 | 86,966 | | 1982 | 89,435 | | 1981 | 90,692 | | 1980 | 89,574 | | 1979 | 86,554 | | 1978 | 81,814 | | 1977 | 75,672 | | 1976 | 69,312 | | 1975 | 63,617 | | 1974 | 58,393 | | 1973 | 53,365 | | 1972 | 49,259 | | 1971 | 46,607 | | 1970 | 45,698 | | 1969 | 46,489 | | 1968 | 49,055 | | 1967 | 52,667 | | 1966 | 55,748 | | 1965 | 57,323 | | 1964 | 57,589 | | 1963 | 56,361 | | 1962 | 54,151 | | 1961 | 52,339 | | 1960 | 51,472 |
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