| Year | Value | | 2022 | 8,638,804 | | 2021 | 8,489,377 | | 2020 | 8,335,753 | | 2019 | 8,177,237 | | 2018 | 8,017,536 | | 2017 | 7,859,443 | | 2016 | 7,700,258 | | 2015 | 7,540,506 | | 2014 | 7,385,274 | | 2013 | 7,236,332 | | 2012 | 7,093,026 | | 2011 | 6,951,869 | | 2010 | 6,811,752 | | 2009 | 6,675,103 | | 2008 | 6,542,089 | | 2007 | 6,413,539 | | 2006 | 6,294,533 | | 2005 | 6,191,787 | | 2004 | 6,095,568 | | 2003 | 5,991,625 | | 2002 | 5,882,648 | | 2001 | 5,815,383 | | 2000 | 5,763,429 | | 1999 | 5,673,787 | | 1998 | 5,568,966 | | 1997 | 5,485,886 | | 1996 | 5,395,852 | | 1995 | 5,267,052 | | 1994 | 5,142,882 | | 1993 | 5,010,480 | | 1992 | 4,878,119 | | 1991 | 4,742,687 | | 1990 | 4,573,332 | | 1989 | 4,433,932 | | 1988 | 4,335,903 | | 1987 | 4,238,804 | | 1986 | 4,145,892 | | 1985 | 4,059,078 | | 1984 | 3,978,851 | | 1983 | 3,905,080 | | 1982 | 3,856,641 | | 1981 | 3,825,755 | | 1980 | 3,798,228 | | 1979 | 3,773,816 | | 1978 | 3,752,311 | | 1977 | 3,732,881 | | 1976 | 3,713,437 | | 1975 | 3,692,657 | | 1974 | 3,669,535 | | 1973 | 3,643,603 | | 1972 | 3,614,639 | | 1971 | 3,582,842 | | 1970 | 3,547,765 | | 1969 | 3,509,487 | | 1968 | 3,468,784 | | 1967 | 3,427,424 | | 1966 | 3,386,565 | | 1965 | 3,346,060 | | 1964 | 3,305,874 | | 1963 | 3,265,995 | | 1962 | 3,226,443 | | 1961 | 3,187,272 | | 1960 | 3,148,533 |
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