| Year | Value | | 2022 | 13,853,989 | | 2021 | 13,794,798 | | 2020 | 13,725,263 | | 2019 | 13,646,945 | | 2018 | 13,564,560 | | 2017 | 13,477,013 | | 2016 | 13,373,618 | | 2015 | 13,255,803 | | 2014 | 13,134,146 | | 2013 | 13,006,395 | | 2012 | 12,872,599 | | 2011 | 12,737,660 | | 2010 | 12,605,012 | | 2009 | 12,467,646 | | 2008 | 12,320,920 | | 2007 | 12,169,718 | | 2006 | 12,014,037 | | 2005 | 11,854,093 | | 2004 | 11,691,469 | | 2003 | 11,528,389 | | 2002 | 11,359,994 | | 2001 | 11,188,148 | | 2000 | 11,026,644 | | 1999 | 10,895,486 | | 1998 | 10,776,303 | | 1997 | 10,658,671 | | 1996 | 10,546,524 | | 1995 | 10,438,910 | | 1994 | 10,328,462 | | 1993 | 10,211,867 | | 1992 | 10,085,189 | | 1991 | 9,954,453 | | 1990 | 9,817,947 | | 1989 | 9,675,863 | | 1988 | 9,536,003 | | 1987 | 9,403,191 | | 1986 | 9,278,454 | | 1985 | 9,160,664 | | 1984 | 9,045,005 | | 1983 | 8,849,724 | | 1982 | 8,606,362 | | 1981 | 8,379,556 | | 1980 | 8,167,679 | | 1979 | 7,952,955 | | 1978 | 7,734,556 | | 1977 | 7,524,586 | | 1976 | 7,327,930 | | 1975 | 7,141,891 | | 1974 | 6,960,247 | | 1973 | 6,783,623 | | 1972 | 6,613,111 | | 1971 | 6,451,454 | | 1970 | 6,295,667 | | 1969 | 6,172,676 | | 1968 | 6,072,855 | | 1967 | 5,976,874 | | 1966 | 5,881,938 | | 1965 | 5,787,273 | | 1964 | 5,692,863 | | 1963 | 5,600,022 | | 1962 | 5,508,076 | | 1961 | 5,417,293 | | 1960 | 5,304,446 |
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