| Year | Value | | 2022 | 13,458,554 | | 2021 | 13,094,226 | | 2020 | 12,729,867 | | 2019 | 12,372,693 | | 2018 | 12,006,035 | | 2017 | 11,637,553 | | 2016 | 11,283,424 | | 2015 | 10,956,591 | | 2014 | 10,632,805 | | 2013 | 10,276,300 | | 2012 | 9,930,715 | | 2011 | 9,601,178 | | 2010 | 9,279,671 | | 2009 | 8,974,567 | | 2008 | 8,667,946 | | 2007 | 8,377,884 | | 2006 | 8,102,386 | | 2005 | 7,823,819 | | 2004 | 7,520,836 | | 2003 | 7,197,536 | | 2002 | 6,920,266 | | 2001 | 6,688,445 | | 2000 | 6,472,108 | | 1999 | 6,257,482 | | 1998 | 6,046,182 | | 1997 | 5,846,105 | | 1996 | 5,651,796 | | 1995 | 5,409,612 | | 1994 | 5,179,459 | | 1993 | 5,067,832 | | 1992 | 4,964,500 | | 1991 | 4,772,128 | | 1990 | 4,614,398 | | 1989 | 4,502,358 | | 1988 | 4,364,827 | | 1987 | 4,230,769 | | 1986 | 4,095,398 | | 1985 | 3,985,050 | | 1984 | 3,957,210 | | 1983 | 3,917,611 | | 1982 | 3,736,216 | | 1981 | 3,572,266 | | 1980 | 3,580,056 | | 1979 | 3,584,347 | | 1978 | 3,519,799 | | 1977 | 3,500,492 | | 1976 | 3,477,397 | | 1975 | 3,448,377 | | 1974 | 3,412,317 | | 1973 | 3,369,716 | | 1972 | 3,323,403 | | 1971 | 3,281,716 | | 1970 | 3,243,150 | | 1969 | 3,204,647 | | 1968 | 3,167,181 | | 1967 | 3,130,590 | | 1966 | 3,093,872 | | 1965 | 3,055,885 | | 1964 | 3,015,572 | | 1963 | 2,968,657 | | 1962 | 2,920,341 | | 1961 | 2,872,694 | | 1960 | 2,825,917 |
|