Year | Value | 2022 | 15,694,378 | 2021 | 15,604,331 | 2020 | 15,499,385 | 2019 | 15,334,134 | 2018 | 15,159,013 | 2017 | 15,010,044 | 2016 | 14,886,610 | 2015 | 14,744,571 | 2014 | 14,584,742 | 2013 | 14,408,141 | 2012 | 14,237,425 | 2011 | 14,075,220 | 2010 | 13,987,212 | 2009 | 13,911,469 | 2008 | 13,869,166 | 2007 | 13,806,409 | 2006 | 13,660,296 | 2005 | 13,261,983 | 2004 | 12,724,615 | 2003 | 12,249,206 | 2002 | 11,763,743 | 2001 | 11,390,089 | 2000 | 11,391,662 | 1999 | 11,568,473 | 1998 | 11,643,581 | 1997 | 11,734,286 | 1996 | 11,812,042 | 1995 | 11,777,805 | 1994 | 11,672,277 | 1993 | 11,551,656 | 1992 | 11,454,299 | 1991 | 11,408,032 | 1990 | 11,402,732 | 1989 | 11,415,986 | 1988 | 11,445,374 | 1987 | 11,453,411 | 1986 | 11,371,633 | 1985 | 11,214,353 | 1984 | 11,019,570 | 1983 | 10,823,058 | 1982 | 10,655,672 | 1981 | 10,543,883 | 1980 | 10,439,216 | 1979 | 10,145,246 | 1978 | 9,509,079 | 1977 | 8,696,752 | 1976 | 7,919,543 | 1975 | 7,310,011 | 1974 | 7,216,014 | 1973 | 7,719,209 | 1972 | 8,454,083 | 1971 | 9,159,238 | 1970 | 9,716,746 | 1969 | 10,022,161 | 1968 | 10,116,995 | 1967 | 10,134,622 | 1966 | 10,125,842 | 1965 | 10,086,963 | 1964 | 9,999,104 | 1963 | 9,884,673 | 1962 | 9,768,827 | 1961 | 9,659,527 | 1960 | 9,536,390 |
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