Year | Value | 2022 | 19,506,079 | 2021 | 19,417,930 | 2020 | 19,583,005 | 2019 | 19,763,813 | 2018 | 19,819,515 | 2017 | 19,930,934 | 2016 | 20,096,440 | 2015 | 20,309,742 | 2014 | 20,585,379 | 2013 | 20,869,361 | 2012 | 21,115,583 | 2011 | 21,326,313 | 2010 | 21,448,035 | 2009 | 21,341,114 | 2008 | 20,958,271 | 2007 | 20,354,135 | 2006 | 19,612,938 | 2005 | 18,902,424 | 2004 | 18,367,175 | 2003 | 17,932,848 | 2002 | 17,510,944 | 2001 | 17,053,267 | 2000 | 16,495,266 | 1999 | 15,879,995 | 1998 | 15,254,156 | 1997 | 14,651,643 | 1996 | 14,113,004 | 1995 | 13,666,172 | 1994 | 13,274,784 | 1993 | 12,960,655 | 1992 | 12,687,608 | 1991 | 12,363,303 | 1990 | 11,987,272 | 1989 | 11,540,487 | 1988 | 11,225,933 | 1987 | 10,921,993 | 1986 | 10,603,837 | 1985 | 10,268,593 | 1984 | 9,929,978 | 1983 | 9,587,636 | 1982 | 9,249,608 | 1981 | 8,864,758 | 1980 | 8,496,366 | 1979 | 8,204,759 | 1978 | 7,942,787 | 1977 | 7,689,377 | 1976 | 7,414,880 | 1975 | 7,150,863 | 1974 | 6,893,405 | 1973 | 6,612,316 | 1972 | 6,316,998 | 1971 | 6,030,889 | 1970 | 5,746,297 | 1969 | 5,450,532 | 1968 | 5,168,869 | 1967 | 4,923,479 | 1966 | 4,707,524 | 1965 | 4,535,855 | 1964 | 4,409,874 | 1963 | 4,327,233 | 1962 | 4,278,902 | 1961 | 4,248,296 | 1960 | 4,225,463 |
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