| Year | Value | | 2022 | 618,023 | | 2021 | 594,976 | | 2020 | 569,986 | | 2019 | 541,618 | | 2018 | 510,193 | | 2017 | 477,581 | | 2016 | 445,399 | | 2015 | 415,267 | | 2014 | 388,039 | | 2013 | 364,669 | | 2012 | 345,515 | | 2011 | 329,441 | | 2010 | 315,149 | | 2009 | 302,528 | | 2008 | 292,381 | | 2007 | 283,960 | | 2006 | 276,537 | | 2005 | 271,365 | | 2004 | 269,005 | | 2003 | 267,602 | | 2002 | 265,946 | | 2001 | 265,023 | | 2000 | 264,965 | | 1999 | 264,368 | | 1998 | 262,416 | | 1997 | 258,849 | | 1996 | 252,992 | | 1995 | 244,531 | | 1994 | 233,901 | | 1993 | 221,466 | | 1992 | 207,759 | | 1991 | 193,923 | | 1990 | 180,710 | | 1989 | 168,038 | | 1988 | 155,841 | | 1987 | 144,468 | | 1986 | 134,125 | | 1985 | 124,923 | | 1984 | 116,938 | | 1983 | 110,219 | | 1982 | 104,829 | | 1981 | 100,745 | | 1980 | 97,995 | | 1979 | 96,653 | | 1978 | 96,723 | | 1977 | 97,830 | | 1976 | 99,398 | | 1975 | 100,937 | | 1974 | 102,291 | | 1973 | 103,501 | | 1972 | 104,346 | | 1971 | 104,611 | | 1970 | 104,142 | | 1969 | 102,796 | | 1968 | 100,324 | | 1967 | 96,857 | | 1966 | 93,084 | | 1965 | 89,457 | | 1964 | 86,083 | | 1963 | 83,282 | | 1962 | 81,055 | | 1961 | 78,732 | | 1960 | 76,001 |
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