| Year | Value | | 2022 | 14,654,460 | | 2021 | 14,652,569 | | 2020 | 14,498,278 | | 2019 | 14,135,439 | | 2018 | 13,653,097 | | 2017 | 13,159,485 | | 2016 | 12,685,189 | | 2015 | 12,254,141 | | 2014 | 11,860,227 | | 2013 | 11,505,317 | | 2012 | 11,160,711 | | 2011 | 10,769,773 | | 2010 | 10,335,673 | | 2009 | 9,851,686 | | 2008 | 9,362,048 | | 2007 | 8,873,289 | | 2006 | 8,412,426 | | 2005 | 7,993,173 | | 2004 | 7,621,976 | | 2003 | 7,299,108 | | 2002 | 7,012,774 | | 2001 | 6,723,334 | | 2000 | 6,448,833 | | 1999 | 6,308,329 | | 1998 | 6,355,525 | | 1997 | 6,517,844 | | 1996 | 6,709,457 | | 1995 | 6,838,298 | | 1994 | 6,822,924 | | 1993 | 6,699,831 | | 1992 | 6,525,137 | | 1991 | 6,342,325 | | 1990 | 6,162,944 | | 1989 | 5,964,352 | | 1988 | 5,761,519 | | 1987 | 5,559,180 | | 1986 | 5,366,686 | | 1985 | 5,196,909 | | 1984 | 5,031,376 | | 1983 | 4,865,767 | | 1982 | 4,698,443 | | 1981 | 4,535,709 | | 1980 | 4,394,347 | | 1979 | 4,261,658 | | 1978 | 4,146,330 | | 1977 | 4,047,293 | | 1976 | 3,966,961 | | 1975 | 3,906,507 | | 1974 | 3,847,044 | | 1973 | 3,788,466 | | 1972 | 3,733,467 | | 1971 | 3,678,748 | | 1970 | 3,630,377 | | 1969 | 3,580,624 | | 1968 | 3,521,503 | | 1967 | 3,446,716 | | 1966 | 3,365,319 | | 1965 | 3,291,720 | | 1964 | 3,205,191 | | 1963 | 3,128,522 | | 1962 | 3,075,822 | | 1961 | 3,007,722 | | 1960 | 2,930,819 |
|