| Year | Value | | 2022 | 17,264,968 | | 2021 | 17,221,897 | | 2020 | 17,069,697 | | 2019 | 16,783,162 | | 2018 | 16,466,620 | | 2017 | 16,176,848 | | 2016 | 15,884,840 | | 2015 | 15,575,095 | | 2014 | 15,249,299 | | 2013 | 14,915,726 | | 2012 | 14,615,457 | | 2011 | 14,295,128 | | 2010 | 13,965,807 | | 2009 | 13,583,672 | | 2008 | 13,215,837 | | 2007 | 12,843,724 | | 2006 | 12,449,117 | | 2005 | 12,029,939 | | 2004 | 11,604,859 | | 2003 | 11,203,290 | | 2002 | 10,804,374 | | 2001 | 10,363,226 | | 2000 | 9,925,597 | | 1999 | 9,690,165 | | 1998 | 9,763,747 | | 1997 | 9,984,385 | | 1996 | 10,194,532 | | 1995 | 10,280,688 | | 1994 | 10,143,742 | | 1993 | 9,874,191 | | 1992 | 9,565,326 | | 1991 | 9,266,308 | | 1990 | 8,976,825 | | 1989 | 8,660,573 | | 1988 | 8,335,792 | | 1987 | 8,021,571 | | 1986 | 7,735,320 | | 1985 | 7,479,895 | | 1984 | 7,225,943 | | 1983 | 6,978,818 | | 1982 | 6,723,740 | | 1981 | 6,456,014 | | 1980 | 6,207,469 | | 1979 | 5,966,641 | | 1978 | 5,744,705 | | 1977 | 5,534,067 | | 1976 | 5,332,708 | | 1975 | 5,157,430 | | 1974 | 4,996,291 | | 1973 | 4,837,685 | | 1972 | 4,685,762 | | 1971 | 4,541,756 | | 1970 | 4,411,016 | | 1969 | 4,276,080 | | 1968 | 4,138,575 | | 1967 | 3,999,939 | | 1966 | 3,852,766 | | 1965 | 3,711,678 | | 1964 | 3,565,924 | | 1963 | 3,435,934 | | 1962 | 3,331,616 | | 1961 | 3,215,218 | | 1960 | 3,100,515 |
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