Year | Value | 2022 | 21,848,204 | 2021 | 22,137,329 | 2020 | 22,418,300 | 2019 | 22,671,314 | 2018 | 22,834,116 | 2017 | 22,944,739 | 2016 | 23,074,511 | 2015 | 23,188,376 | 2014 | 23,267,427 | 2013 | 23,347,697 | 2012 | 23,422,582 | 2011 | 23,489,361 | 2010 | 23,576,528 | 2009 | 23,709,164 | 2008 | 23,839,015 | 2007 | 23,988,524 | 2006 | 24,162,459 | 2005 | 24,347,614 | 2004 | 24,530,342 | 2003 | 24,710,605 | 2002 | 24,862,804 | 2001 | 24,965,117 | 2000 | 25,041,030 | 1999 | 25,113,936 | 1998 | 25,178,064 | 1997 | 25,217,549 | 1996 | 25,245,146 | 1995 | 25,259,696 | 1994 | 25,251,497 | 1993 | 25,229,928 | 1992 | 25,202,223 | 1991 | 25,153,141 | 1990 | 25,072,960 | 1989 | 24,988,526 | 1988 | 24,907,281 | 1987 | 24,818,107 | 1986 | 24,716,204 | 1985 | 24,579,701 | 1984 | 24,394,488 | 1983 | 24,168,723 | 1982 | 23,916,293 | 1981 | 23,649,709 | 1980 | 23,363,664 | 1979 | 23,050,610 | 1978 | 22,722,527 | 1977 | 22,390,535 | 1976 | 22,066,206 | 1975 | 21,748,488 | 1974 | 21,437,426 | 1973 | 21,138,524 | 1972 | 20,860,532 | 1971 | 20,607,559 | 1970 | 20,359,567 | 1969 | 20,109,545 | 1968 | 19,854,761 | 1967 | 19,572,800 | 1966 | 19,244,518 | 1965 | 18,869,199 | 1964 | 18,451,941 | 1963 | 18,004,412 | 1962 | 17,544,206 | 1961 | 17,080,660 | 1960 | 16,617,955 |
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