Year | Value | 2022 | 15,647,844 | 2021 | 15,780,806 | 2020 | 15,893,831 | 2019 | 15,988,519 | 2018 | 16,141,348 | 2017 | 16,297,697 | 2016 | 16,396,859 | 2015 | 16,440,560 | 2014 | 16,482,648 | 2013 | 16,474,995 | 2012 | 16,389,372 | 2011 | 16,311,713 | 2010 | 16,310,088 | 2009 | 16,209,575 | 2008 | 16,073,636 | 2007 | 15,968,044 | 2006 | 15,881,295 | 2005 | 15,781,825 | 2004 | 15,660,489 | 2003 | 15,505,607 | 2002 | 15,344,333 | 2001 | 15,198,287 | 2000 | 15,081,158 | 1999 | 14,995,489 | 1998 | 14,927,955 | 1997 | 14,844,721 | 1996 | 14,676,438 | 1995 | 14,253,495 | 1994 | 13,697,784 | 1993 | 13,211,401 | 1992 | 12,712,394 | 1991 | 12,322,276 | 1990 | 12,308,730 | 1989 | 12,504,048 | 1988 | 12,619,503 | 1987 | 12,750,812 | 1986 | 12,881,621 | 1985 | 12,903,496 | 1984 | 12,840,250 | 1983 | 12,754,803 | 1982 | 12,700,056 | 1981 | 12,680,245 | 1980 | 12,698,850 | 1979 | 12,741,572 | 1978 | 12,817,322 | 1977 | 12,893,155 | 1976 | 12,928,805 | 1975 | 12,944,798 | 1974 | 12,957,183 | 1973 | 12,985,134 | 1972 | 13,033,073 | 1971 | 13,081,276 | 1970 | 13,088,883 | 1969 | 12,789,210 | 1968 | 11,997,951 | 1967 | 10,989,411 | 1966 | 10,025,535 | 1965 | 9,284,310 | 1964 | 9,203,257 | 1963 | 9,834,615 | 1962 | 10,715,757 | 1961 | 11,545,544 | 1960 | 12,166,911 |
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