| Year | Value | | 2022 | 1,570,319 | | 2021 | 1,519,988 | | 2020 | 1,470,245 | | 2019 | 1,424,439 | | 2018 | 1,380,906 | | 2017 | 1,340,124 | | 2016 | 1,306,640 | | 2015 | 1,276,083 | | 2014 | 1,249,275 | | 2013 | 1,218,964 | | 2012 | 1,183,034 | | 2011 | 1,147,380 | | 2010 | 1,107,213 | | 2009 | 1,066,563 | | 2008 | 1,021,965 | | 2007 | 966,133 | | 2006 | 923,099 | | 2005 | 880,640 | | 2004 | 833,474 | | 2003 | 775,957 | | 2002 | 721,965 | | 2001 | 675,922 | | 2000 | 636,195 | | 1999 | 606,439 | | 1998 | 578,435 | | 1997 | 551,991 | | 1996 | 527,371 | | 1995 | 485,677 | | 1994 | 444,346 | | 1993 | 416,395 | | 1992 | 389,879 | | 1991 | 399,483 | | 1990 | 406,450 | | 1989 | 383,408 | | 1988 | 360,908 | | 1987 | 339,300 | | 1986 | 318,781 | | 1985 | 299,264 | | 1984 | 280,805 | | 1983 | 268,892 | | 1982 | 258,367 | | 1981 | 248,276 | | 1980 | 238,584 | | 1979 | 229,341 | | 1978 | 220,486 | | 1977 | 211,985 | | 1976 | 203,845 | | 1975 | 196,027 | | 1974 | 188,538 | | 1973 | 181,328 | | 1972 | 174,389 | | 1971 | 167,734 | | 1970 | 161,359 | | 1969 | 155,281 | | 1968 | 149,483 | | 1967 | 143,906 | | 1966 | 136,053 | | 1965 | 128,619 | | 1964 | 121,603 | | 1963 | 114,969 | | 1962 | 108,717 | | 1961 | 102,853 | | 1960 | 97,360 |
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