Year | Value | 2022 | 29,168,006 | 2021 | 28,894,608 | 2020 | 28,580,784 | 2019 | 28,207,948 | 2018 | 27,822,349 | 2017 | 27,465,269 | 2016 | 27,418,165 | 2015 | 27,155,417 | 2014 | 26,500,685 | 2013 | 26,036,121 | 2012 | 25,651,390 | 2011 | 25,278,908 | 2010 | 24,927,507 | 2009 | 24,599,914 | 2008 | 24,278,088 | 2007 | 23,972,107 | 2006 | 23,696,246 | 2005 | 23,433,293 | 2004 | 23,176,582 | 2003 | 22,925,383 | 2002 | 22,681,781 | 2001 | 22,447,806 | 2000 | 22,221,377 | 1999 | 21,977,029 | 1998 | 21,703,485 | 1997 | 21,405,714 | 1996 | 21,154,148 | 1995 | 20,960,968 | 1994 | 20,745,186 | 1993 | 20,519,374 | 1992 | 20,288,796 | 1991 | 19,938,864 | 1990 | 19,422,611 | 1989 | 18,810,138 | 1988 | 18,162,510 | 1987 | 17,515,110 | 1986 | 16,884,765 | 1985 | 16,509,631 | 1984 | 16,336,890 | 1983 | 16,125,715 | 1982 | 15,892,088 | 1981 | 15,631,582 | 1980 | 15,277,164 | 1979 | 14,834,845 | 1978 | 14,394,419 | 1977 | 13,954,172 | 1976 | 13,548,594 | 1975 | 13,167,635 | 1974 | 12,779,064 | 1973 | 12,391,239 | 1972 | 12,008,340 | 1971 | 11,639,172 | 1970 | 11,297,621 | 1969 | 10,978,417 | 1968 | 10,665,272 | 1967 | 10,359,445 | 1966 | 10,062,791 | 1965 | 9,774,939 | 1964 | 9,496,079 | 1963 | 9,228,327 | 1962 | 8,971,110 | 1961 | 8,725,719 | 1960 | 8,502,461 |
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