Year | Value | 2022 | 40,662,423 | 2021 | 40,955,966 | 2020 | 41,685,686 | 2019 | 42,109,620 | 2018 | 42,295,783 | 2017 | 42,321,853 | 2016 | 42,149,355 | 2015 | 41,901,182 | 2014 | 41,814,318 | 2013 | 41,857,332 | 2012 | 41,965,796 | 2011 | 42,164,903 | 2010 | 42,471,750 | 2009 | 42,564,479 | 2008 | 42,334,780 | 2007 | 41,894,600 | 2006 | 41,423,676 | 2005 | 41,059,757 | 2004 | 40,937,268 | 2003 | 40,971,018 | 2002 | 41,097,370 | 2001 | 41,406,339 | 2000 | 41,801,503 | 1999 | 42,092,863 | 1998 | 42,290,528 | 1997 | 42,442,437 | 1996 | 42,342,313 | 1995 | 42,167,274 | 1994 | 42,183,438 | 1993 | 42,211,049 | 1992 | 42,153,526 | 1991 | 42,178,612 | 1990 | 42,218,240 | 1989 | 42,069,824 | 1988 | 41,825,879 | 1987 | 41,562,071 | 1986 | 41,235,793 | 1985 | 40,860,509 | 1984 | 40,450,283 | 1983 | 39,943,596 | 1982 | 39,378,508 | 1981 | 39,032,405 | 1980 | 38,588,000 | 1979 | 38,039,050 | 1978 | 37,804,244 | 1977 | 37,737,699 | 1976 | 37,224,980 | 1975 | 36,096,995 | 1974 | 34,828,527 | 1973 | 33,575,962 | 1972 | 32,201,591 | 1971 | 30,955,203 | 1970 | 30,428,836 | 1969 | 30,289,262 | 1968 | 29,869,619 | 1967 | 29,474,571 | 1966 | 29,277,866 | 1965 | 29,023,752 | 1964 | 28,657,587 | 1963 | 28,385,508 | 1962 | 28,186,179 | 1961 | 28,033,314 | 1960 | 28,072,458 |
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