| Year | Value | | 2022 | 630,682 | | 2021 | 608,202 | | 2020 | 587,548 | | 2019 | 568,858 | | 2018 | 551,692 | | 2017 | 535,900 | | 2016 | 520,807 | | 2015 | 505,595 | | 2014 | 489,717 | | 2013 | 473,307 | | 2012 | 456,750 | | 2011 | 440,245 | | 2010 | 423,779 | | 2009 | 407,374 | | 2008 | 391,109 | | 2007 | 374,852 | | 2006 | 358,698 | | 2005 | 342,940 | | 2004 | 327,637 | | 2003 | 312,827 | | 2002 | 298,705 | | 2001 | 285,302 | | 2000 | 272,920 | | 1999 | 260,519 | | 1998 | 248,979 | | 1997 | 240,335 | | 1996 | 233,894 | | 1995 | 228,778 | | 1994 | 225,891 | | 1993 | 224,304 | | 1992 | 221,826 | | 1991 | 219,017 | | 1990 | 216,481 | | 1989 | 214,396 | | 1988 | 212,653 | | 1987 | 210,865 | | 1986 | 208,291 | | 1985 | 204,313 | | 1984 | 198,914 | | 1983 | 192,131 | | 1982 | 184,119 | | 1981 | 175,479 | | 1980 | 166,677 | | 1979 | 157,817 | | 1978 | 149,085 | | 1977 | 140,591 | | 1976 | 132,311 | | 1975 | 124,208 | | 1974 | 116,324 | | 1973 | 108,754 | | 1972 | 101,698 | | 1971 | 95,725 | | 1970 | 91,237 | | 1969 | 89,622 | | 1968 | 91,116 | | 1967 | 93,740 | | 1966 | 96,205 | | 1965 | 97,823 | | 1964 | 98,463 | | 1963 | 98,320 | | 1962 | 97,649 | | 1961 | 96,668 | | 1960 | 96,859 |
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