| Year | Value | | 2022 | 6,214,549 | | 2021 | 5,985,335 | | 2020 | 5,997,822 | | 2019 | 6,090,855 | | 2018 | 6,109,746 | | 2017 | 6,125,791 | | 2016 | 6,123,946 | | 2015 | 6,023,269 | | 2014 | 5,870,353 | | 2013 | 5,707,850 | | 2012 | 5,552,059 | | 2011 | 5,426,480 | | 2010 | 5,345,052 | | 2009 | 5,247,120 | | 2008 | 5,173,887 | | 2007 | 5,110,448 | | 2006 | 5,010,177 | | 2005 | 4,870,998 | | 2004 | 4,711,823 | | 2003 | 4,556,093 | | 2002 | 4,418,974 | | 2001 | 4,314,738 | | 2000 | 4,226,646 | | 1999 | 4,074,728 | | 1998 | 3,808,643 | | 1997 | 3,478,434 | | 1996 | 3,133,548 | | 1995 | 2,836,138 | | 1994 | 2,746,535 | | 1993 | 2,896,768 | | 1992 | 3,140,377 | | 1991 | 3,371,077 | | 1990 | 3,525,685 | | 1989 | 3,571,632 | | 1988 | 3,540,370 | | 1987 | 3,484,949 | | 1986 | 3,433,153 | | 1985 | 3,390,863 | | 1984 | 3,339,050 | | 1983 | 3,281,829 | | 1982 | 3,228,403 | | 1981 | 3,180,708 | | 1980 | 3,125,863 | | 1979 | 3,050,464 | | 1978 | 2,960,271 | | 1977 | 2,854,184 | | 1976 | 2,738,419 | | 1975 | 2,620,245 | | 1974 | 2,510,124 | | 1973 | 2,426,594 | | 1972 | 2,359,216 | | 1971 | 2,301,883 | | 1970 | 2,264,417 | | 1969 | 2,251,023 | | 1968 | 2,245,083 | | 1967 | 2,237,103 | | 1966 | 2,223,311 | | 1965 | 2,209,531 | | 1964 | 2,193,783 | | 1963 | 2,167,336 | | 1962 | 2,141,954 | | 1961 | 2,117,453 | | 1960 | 2,090,124 |
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