Year | Value | 2022 | 55,771,091 | 2021 | 58,068,220 | 2020 | 58,042,855 | 2019 | 56,351,527 | 2018 | 54,526,704 | 2017 | 52,945,956 | 2016 | 51,580,384 | 2015 | 50,333,972 | 2014 | 49,393,740 | 2013 | 48,547,327 | 2012 | 47,078,229 | 2011 | 45,723,128 | 2010 | 45,574,930 | 2009 | 46,598,034 | 2008 | 48,969,869 | 2007 | 52,130,138 | 2006 | 55,321,989 | 2005 | 58,491,926 | 2004 | 61,041,585 | 2003 | 62,587,446 | 2002 | 62,809,034 | 2001 | 62,090,288 | 2000 | 61,290,165 | 1999 | 60,392,574 | 1998 | 60,078,506 | 1997 | 59,779,652 | 1996 | 56,627,219 | 1995 | 51,155,918 | 1994 | 45,849,229 | 1993 | 40,814,610 | 1992 | 37,914,998 | 1991 | 38,644,976 | 1990 | 41,171,019 | 1989 | 43,716,112 | 1988 | 45,101,172 | 1987 | 45,060,198 | 1986 | 44,417,225 | 1985 | 43,311,286 | 1984 | 41,505,218 | 1983 | 39,290,207 | 1982 | 36,606,285 | 1981 | 33,894,887 | 1980 | 31,469,092 | 1979 | 29,199,978 | 1978 | 27,335,537 | 1977 | 25,830,668 | 1976 | 24,812,770 | 1975 | 24,115,351 | 1974 | 23,591,422 | 1973 | 23,256,722 | 1972 | 23,100,833 | 1971 | 22,961,097 | 1970 | 22,907,105 | 1969 | 23,055,174 | 1968 | 23,241,089 | 1967 | 23,206,695 | 1966 | 22,865,631 | 1965 | 22,389,019 | 1964 | 21,985,256 | 1963 | 21,622,472 | 1962 | 21,256,271 | 1961 | 20,997,986 | 1960 | 20,938,514 |
|