Year | Value | 2022 | 30,429,133 | 2021 | 30,181,537 | 2020 | 29,921,058 | 2019 | 29,492,072 | 2018 | 29,379,522 | 2017 | 29,393,402 | 2016 | 29,055,000 | 2015 | 28,158,359 | 2014 | 27,069,004 | 2013 | 25,957,421 | 2012 | 24,798,781 | 2011 | 23,803,352 | 2010 | 23,514,658 | 2009 | 23,459,537 | 2008 | 23,164,062 | 2007 | 22,867,868 | 2006 | 22,661,885 | 2005 | 22,337,156 | 2004 | 21,905,635 | 2003 | 21,520,554 | 2002 | 21,157,611 | 2001 | 20,831,264 | 2000 | 20,673,408 | 1999 | 20,731,587 | 1998 | 20,807,797 | 1997 | 20,798,291 | 1996 | 20,664,557 | 1995 | 20,279,384 | 1994 | 19,687,026 | 1993 | 19,170,790 | 1992 | 18,719,194 | 1991 | 18,218,769 | 1990 | 17,847,741 | 1989 | 17,461,041 | 1988 | 16,663,846 | 1987 | 15,701,097 | 1986 | 14,897,599 | 1985 | 14,219,812 | 1984 | 13,959,732 | 1983 | 14,280,616 | 1982 | 14,890,560 | 1981 | 15,455,270 | 1980 | 15,839,482 | 1979 | 15,973,548 | 1978 | 15,897,305 | 1977 | 15,745,386 | 1976 | 15,524,398 | 1975 | 15,286,691 | 1974 | 15,031,908 | 1973 | 14,728,938 | 1972 | 14,458,448 | 1971 | 14,228,405 | 1970 | 13,953,024 | 1969 | 13,672,902 | 1968 | 13,402,438 | 1967 | 13,059,993 | 1966 | 12,661,696 | 1965 | 12,296,187 | 1964 | 11,956,972 | 1963 | 11,638,489 | 1962 | 11,339,288 | 1961 | 11,090,833 | 1960 | 10,878,704 |
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