| Year | Value | | 2022 | 3,580,251 | | 2021 | 3,514,652 | | 2020 | 3,525,235 | | 2019 | 3,602,442 | | 2018 | 3,707,264 | | 2017 | 3,873,335 | | 2016 | 4,141,059 | | 2015 | 4,492,788 | | 2014 | 4,897,828 | | 2013 | 5,318,985 | | 2012 | 5,724,959 | | 2011 | 6,035,489 | | 2010 | 6,200,069 | | 2009 | 6,245,210 | | 2008 | 6,266,419 | | 2007 | 6,242,682 | | 2006 | 6,151,980 | | 2005 | 6,103,636 | | 2004 | 6,052,983 | | 2003 | 5,918,843 | | 2002 | 5,747,567 | | 2001 | 5,622,809 | | 2000 | 5,540,242 | | 1999 | 5,470,866 | | 1998 | 5,397,927 | | 1997 | 5,334,939 | | 1996 | 5,282,934 | | 1995 | 5,218,471 | | 1994 | 5,150,103 | | 1993 | 5,064,565 | | 1992 | 4,960,592 | | 1991 | 4,887,694 | | 1990 | 4,887,171 | | 1989 | 4,952,921 | | 1988 | 5,105,883 | | 1987 | 5,365,708 | | 1986 | 5,673,317 | | 1985 | 5,994,985 | | 1984 | 6,296,980 | | 1983 | 6,539,513 | | 1982 | 6,692,719 | | 1981 | 6,727,370 | | 1980 | 6,681,120 | | 1979 | 6,637,203 | | 1978 | 6,516,930 | | 1977 | 6,347,953 | | 1976 | 6,262,300 | | 1975 | 6,183,863 | | 1974 | 6,114,013 | | 1973 | 6,040,135 | | 1972 | 5,914,870 | | 1971 | 5,740,201 | | 1970 | 5,322,680 | | 1969 | 4,584,451 | | 1968 | 3,829,342 | | 1967 | 3,289,452 | | 1966 | 3,106,711 | | 1965 | 3,402,330 | | 1964 | 4,068,719 | | 1963 | 4,935,665 | | 1962 | 5,750,734 | | 1961 | 6,171,641 | | 1960 | 6,200,345 |
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