| Year | Value | | 2022 | 14,777,136 | | 2021 | 14,374,982 | | 2020 | 13,978,515 | | 2019 | 13,550,960 | | 2018 | 13,108,423 | | 2017 | 12,670,919 | | 2016 | 12,237,149 | | 2015 | 11,814,397 | | 2014 | 11,398,071 | | 2013 | 10,970,571 | | 2012 | 10,534,844 | | 2011 | 10,102,927 | | 2010 | 9,675,468 | | 2009 | 9,271,425 | | 2008 | 8,899,696 | | 2007 | 8,573,486 | | 2006 | 8,284,635 | | 2005 | 8,030,300 | | 2004 | 7,803,662 | | 2003 | 7,594,636 | | 2002 | 7,394,941 | | 2001 | 7,203,370 | | 2000 | 7,019,432 | | 1999 | 6,838,726 | | 1998 | 6,666,009 | | 1997 | 6,507,859 | | 1996 | 6,361,245 | | 1995 | 6,223,837 | | 1994 | 6,092,983 | | 1993 | 5,962,962 | | 1992 | 5,829,535 | | 1991 | 5,688,430 | | 1990 | 5,539,396 | | 1989 | 5,383,223 | | 1988 | 5,216,848 | | 1987 | 5,042,375 | | 1986 | 4,867,461 | | 1985 | 4,696,510 | | 1984 | 4,529,566 | | 1983 | 4,367,120 | | 1982 | 4,214,940 | | 1981 | 4,080,214 | | 1980 | 3,964,735 | | 1979 | 3,864,920 | | 1978 | 3,780,249 | | 1977 | 3,707,106 | | 1976 | 3,635,655 | | 1975 | 3,557,523 | | 1974 | 3,470,081 | | 1973 | 3,372,269 | | 1972 | 3,265,852 | | 1971 | 3,157,185 | | 1970 | 3,052,327 | | 1969 | 2,952,330 | | 1968 | 2,857,740 | | 1967 | 2,770,336 | | 1966 | 2,687,769 | | 1965 | 2,607,553 | | 1964 | 2,527,352 | | 1963 | 2,446,260 | | 1962 | 2,364,550 | | 1961 | 2,281,382 | | 1960 | 2,196,792 |
|