Year | Value | 2022 | 25,641,028 | 2021 | 24,596,509 | 2020 | 24,239,168 | 2019 | 24,023,238 | 2018 | 23,572,529 | 2017 | 23,109,219 | 2016 | 22,738,645 | 2015 | 22,345,516 | 2014 | 21,958,537 | 2013 | 21,610,145 | 2012 | 21,288,586 | 2011 | 21,002,646 | 2010 | 20,780,084 | 2009 | 20,599,704 | 2008 | 20,457,988 | 2007 | 20,298,862 | 2006 | 20,149,300 | 2005 | 19,967,418 | 2004 | 19,707,908 | 2003 | 19,557,550 | 2002 | 19,452,607 | 2001 | 19,207,885 | 2000 | 18,977,918 | 1999 | 18,614,951 | 1998 | 17,754,809 | 1997 | 16,677,395 | 1996 | 15,715,342 | 1995 | 14,861,973 | 1994 | 14,462,255 | 1993 | 14,703,789 | 1992 | 15,211,246 | 1991 | 15,639,197 | 1990 | 15,865,770 | 1989 | 15,838,490 | 1988 | 15,625,018 | 1987 | 15,331,536 | 1986 | 14,971,346 | 1985 | 14,610,127 | 1984 | 14,235,684 | 1983 | 13,830,740 | 1982 | 13,474,014 | 1981 | 13,181,481 | 1980 | 12,888,131 | 1979 | 12,575,019 | 1978 | 12,266,799 | 1977 | 11,915,116 | 1976 | 11,548,067 | 1975 | 11,212,575 | 1974 | 10,882,883 | 1973 | 10,561,801 | 1972 | 10,221,935 | 1971 | 9,895,944 | 1970 | 9,599,760 | 1969 | 9,369,835 | 1968 | 9,182,902 | 1967 | 9,009,686 | 1966 | 8,800,294 | 1965 | 8,574,692 | 1964 | 8,347,983 | 1963 | 8,098,093 | 1962 | 7,858,233 | 1961 | 7,632,265 | 1960 | 7,407,178 |
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