Year | Value | 2022 | 40,808,264 | 2021 | 40,987,182 | 2020 | 41,336,825 | 2019 | 41,490,891 | 2018 | 41,545,321 | 2017 | 41,464,342 | 2016 | 41,319,984 | 2015 | 41,147,745 | 2014 | 41,074,694 | 2013 | 41,117,800 | 2012 | 41,246,697 | 2011 | 41,523,741 | 2010 | 41,917,710 | 2009 | 42,170,370 | 2008 | 42,319,813 | 2007 | 42,372,070 | 2006 | 42,177,841 | 2005 | 41,934,941 | 2004 | 41,943,537 | 2003 | 42,024,475 | 2002 | 42,022,447 | 2001 | 42,092,629 | 2000 | 42,163,709 | 1999 | 41,983,467 | 1998 | 41,684,055 | 1997 | 41,357,999 | 1996 | 40,980,311 | 1995 | 40,537,307 | 1994 | 40,052,025 | 1993 | 39,486,338 | 1992 | 38,888,978 | 1991 | 38,458,454 | 1990 | 37,969,390 | 1989 | 37,407,693 | 1988 | 37,147,446 | 1987 | 37,135,981 | 1986 | 36,696,981 | 1985 | 35,576,662 | 1984 | 34,373,809 | 1983 | 33,194,174 | 1982 | 31,809,543 | 1981 | 30,628,075 | 1980 | 30,221,366 | 1979 | 30,076,718 | 1978 | 29,658,271 | 1977 | 29,257,951 | 1976 | 29,026,169 | 1975 | 28,779,566 | 1974 | 28,467,189 | 1973 | 28,193,267 | 1972 | 27,976,113 | 1971 | 27,792,301 | 1970 | 27,638,652 | 1969 | 27,691,858 | 1968 | 27,767,864 | 1967 | 27,806,910 | 1966 | 27,867,650 | 1965 | 27,900,682 | 1964 | 27,818,935 | 1963 | 27,899,020 | 1962 | 28,021,425 | 1961 | 27,889,891 | 1960 | 27,772,258 |
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