| Year | Value | | 2022 | 15,787,189 | | 2021 | 15,551,414 | | 2020 | 15,367,032 | | 2019 | 15,150,360 | | 2018 | 14,881,926 | | 2017 | 14,614,138 | | 2016 | 14,337,612 | | 2015 | 14,062,250 | | 2014 | 13,785,778 | | 2013 | 13,509,052 | | 2012 | 13,247,067 | | 2011 | 13,005,013 | | 2010 | 12,770,372 | | 2009 | 12,523,196 | | 2008 | 12,272,579 | | 2007 | 12,031,936 | | 2006 | 11,807,219 | | 2005 | 11,599,279 | | 2004 | 11,407,075 | | 2003 | 11,227,335 | | 2002 | 11,051,927 | | 2001 | 10,871,915 | | 2000 | 10,690,183 | | 1999 | 10,501,440 | | 1998 | 10,311,231 | | 1997 | 10,128,306 | | 1996 | 9,947,011 | | 1995 | 9,770,905 | | 1994 | 9,609,149 | | 1993 | 9,439,668 | | 1992 | 9,283,569 | | 1991 | 9,117,681 | | 1990 | 8,902,428 | | 1989 | 8,674,834 | | 1988 | 8,452,225 | | 1987 | 8,250,669 | | 1986 | 8,053,358 | | 1985 | 7,860,405 | | 1984 | 7,676,430 | | 1983 | 7,501,801 | | 1982 | 7,330,943 | | 1981 | 7,167,413 | | 1980 | 7,011,110 | | 1979 | 6,856,409 | | 1978 | 6,700,669 | | 1977 | 6,539,395 | | 1976 | 6,378,790 | | 1975 | 6,226,437 | | 1974 | 6,082,599 | | 1973 | 5,952,246 | | 1972 | 5,831,616 | | 1971 | 5,719,310 | | 1970 | 5,613,113 | | 1969 | 5,513,031 | | 1968 | 5,416,425 | | 1967 | 5,320,289 | | 1966 | 5,229,173 | | 1965 | 5,141,185 | | 1964 | 5,053,028 | | 1963 | 4,959,549 | | 1962 | 4,862,983 | | 1961 | 4,768,681 | | 1960 | 4,688,102 |
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