Year | Value | 2022 | 20,176,395 | 2021 | 19,726,159 | 2020 | 19,391,349 | 2019 | 19,079,428 | 2018 | 18,756,086 | 2017 | 18,497,037 | 2016 | 18,346,812 | 2015 | 18,281,588 | 2014 | 18,280,286 | 2013 | 18,413,595 | 2012 | 18,672,536 | 2011 | 18,982,886 | 2010 | 19,257,650 | 2009 | 19,428,170 | 2008 | 19,505,685 | 2007 | 19,493,997 | 2006 | 19,409,370 | 2005 | 19,281,727 | 2004 | 19,127,266 | 2003 | 18,934,981 | 2002 | 18,700,603 | 2001 | 18,370,360 | 2000 | 17,928,807 | 1999 | 17,437,560 | 1998 | 16,897,054 | 1997 | 16,300,678 | 1996 | 15,685,911 | 1995 | 15,101,488 | 1994 | 14,547,712 | 1993 | 14,060,174 | 1992 | 13,630,602 | 1991 | 13,206,192 | 1990 | 12,802,026 | 1989 | 12,335,744 | 1988 | 12,003,991 | 1987 | 11,689,918 | 1986 | 11,372,948 | 1985 | 11,059,189 | 1984 | 10,752,319 | 1983 | 10,444,666 | 1982 | 10,141,702 | 1981 | 9,804,561 | 1980 | 9,455,450 | 1979 | 9,138,283 | 1978 | 8,844,987 | 1977 | 8,553,761 | 1976 | 8,261,378 | 1975 | 8,002,040 | 1974 | 7,763,884 | 1973 | 7,536,650 | 1972 | 7,317,482 | 1971 | 7,088,542 | 1970 | 6,842,657 | 1969 | 6,594,002 | 1968 | 6,336,182 | 1967 | 6,075,560 | 1966 | 5,823,346 | 1965 | 5,581,908 | 1964 | 5,336,001 | 1963 | 5,099,133 | 1962 | 4,885,587 | 1961 | 4,692,183 | 1960 | 4,533,403 |
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