| Year | Value | | 2022 | 581,592 | | 2021 | 566,383 | | 2020 | 551,519 | | 2019 | 536,626 | | 2018 | 520,430 | | 2017 | 505,482 | | 2016 | 493,039 | | 2015 | 481,592 | | 2014 | 471,163 | | 2013 | 461,376 | | 2012 | 451,713 | | 2011 | 442,083 | | 2010 | 432,493 | | 2009 | 422,701 | | 2008 | 412,629 | | 2007 | 402,518 | | 2006 | 392,420 | | 2005 | 381,996 | | 2004 | 371,324 | | 2003 | 360,932 | | 2002 | 350,971 | | 2001 | 341,540 | | 2000 | 332,811 | | 1999 | 324,684 | | 1998 | 316,825 | | 1997 | 308,999 | | 1996 | 301,174 | | 1995 | 293,521 | | 1994 | 286,097 | | 1993 | 278,183 | | 1992 | 268,518 | | 1991 | 257,285 | | 1990 | 245,750 | | 1989 | 234,366 | | 1988 | 223,713 | | 1987 | 214,867 | | 1986 | 207,486 | | 1985 | 200,362 | | 1984 | 193,196 | | 1983 | 186,129 | | 1982 | 179,359 | | 1981 | 173,101 | | 1980 | 167,369 | | 1979 | 162,099 | | 1978 | 157,363 | | 1977 | 153,121 | | 1976 | 149,094 | | 1975 | 145,123 | | 1974 | 141,237 | | 1973 | 137,447 | | 1972 | 133,701 | | 1971 | 130,012 | | 1970 | 126,399 | | 1969 | 122,847 | | 1968 | 119,331 | | 1967 | 115,883 | | 1966 | 112,574 | | 1965 | 109,442 | | 1964 | 106,466 | | 1963 | 103,594 | | 1962 | 100,933 | | 1961 | 98,697 | | 1960 | 96,970 |
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