Year | Value | 2022 | 23,994,819 | 2021 | 23,725,239 | 2020 | 23,309,854 | 2019 | 23,021,883 | 2018 | 22,879,487 | 2017 | 22,733,879 | 2016 | 22,583,720 | 2015 | 22,486,677 | 2014 | 22,468,946 | 2013 | 22,503,531 | 2012 | 22,559,301 | 2011 | 22,601,663 | 2010 | 22,607,115 | 2009 | 22,585,334 | 2008 | 22,552,271 | 2007 | 22,497,973 | 2006 | 22,418,608 | 2005 | 22,303,179 | 2004 | 22,144,717 | 2003 | 21,949,127 | 2002 | 21,724,876 | 2001 | 21,475,448 | 2000 | 21,269,264 | 1999 | 21,039,071 | 1998 | 20,779,285 | 1997 | 20,498,081 | 1996 | 20,197,989 | 1995 | 19,878,056 | 1994 | 19,520,905 | 1993 | 19,140,836 | 1992 | 18,718,455 | 1991 | 18,282,773 | 1990 | 17,879,682 | 1989 | 17,509,896 | 1988 | 17,178,530 | 1987 | 16,870,370 | 1986 | 16,562,957 | 1985 | 16,245,024 | 1984 | 15,920,956 | 1983 | 15,591,585 | 1982 | 15,265,598 | 1981 | 14,951,558 | 1980 | 14,650,219 | 1979 | 14,352,289 | 1978 | 14,061,997 | 1977 | 13,778,966 | 1976 | 13,510,520 | 1975 | 13,252,937 | 1974 | 12,998,129 | 1973 | 12,749,314 | 1972 | 12,504,288 | 1971 | 12,263,236 | 1970 | 12,006,734 | 1969 | 11,753,485 | 1968 | 11,507,515 | 1967 | 11,267,692 | 1966 | 11,036,625 | 1965 | 10,813,176 | 1964 | 10,596,265 | 1963 | 10,388,824 | 1962 | 10,188,902 | 1961 | 9,995,005 | 1960 | 9,814,097 |
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