Year | Value | 2022 | 20,896,679 | 2021 | 20,629,076 | 2020 | 20,406,941 | 2019 | 20,159,099 | 2018 | 19,852,187 | 2017 | 19,538,193 | 2016 | 19,226,159 | 2015 | 18,914,300 | 2014 | 18,600,329 | 2013 | 18,285,591 | 2012 | 17,985,498 | 2011 | 17,706,857 | 2010 | 17,437,731 | 2009 | 17,156,046 | 2008 | 16,871,034 | 2007 | 16,596,678 | 2006 | 16,337,424 | 2005 | 16,094,056 | 2004 | 15,866,211 | 2003 | 15,650,372 | 2002 | 15,438,937 | 2001 | 15,223,077 | 2000 | 15,005,566 | 1999 | 14,780,006 | 1998 | 14,550,681 | 1997 | 14,327,350 | 1996 | 14,105,998 | 1995 | 13,890,797 | 1994 | 13,690,678 | 1993 | 13,483,612 | 1992 | 13,290,051 | 1991 | 13,087,930 | 1990 | 12,840,192 | 1989 | 12,580,559 | 1988 | 12,323,854 | 1987 | 12,086,731 | 1986 | 11,850,824 | 1985 | 11,614,984 | 1984 | 11,385,949 | 1983 | 11,165,416 | 1982 | 10,947,561 | 1981 | 10,736,950 | 1980 | 10,534,478 | 1979 | 10,336,691 | 1978 | 10,139,865 | 1977 | 9,937,233 | 1976 | 9,735,233 | 1975 | 9,541,610 | 1974 | 9,356,705 | 1973 | 9,184,840 | 1972 | 9,021,956 | 1971 | 8,864,552 | 1970 | 8,711,961 | 1969 | 8,565,672 | 1968 | 8,421,744 | 1967 | 8,277,883 | 1966 | 8,137,764 | 1965 | 7,999,238 | 1964 | 7,859,746 | 1963 | 7,714,789 | 1962 | 7,567,119 | 1961 | 7,421,996 | 1960 | 7,289,457 |
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