Year | Value | 2022 | 48,990,227 | 2021 | 47,476,878 | 2020 | 47,154,032 | 2019 | 47,996,757 | 2018 | 50,225,149 | 2017 | 53,289,453 | 2016 | 56,378,702 | 2015 | 59,463,804 | 2014 | 61,937,996 | 2013 | 63,382,637 | 2012 | 63,500,706 | 2011 | 62,682,146 | 2010 | 61,855,279 | 2009 | 61,030,410 | 2008 | 60,858,117 | 2007 | 60,732,395 | 2006 | 57,702,234 | 2005 | 52,229,069 | 2004 | 46,873,136 | 2003 | 41,762,152 | 2002 | 38,781,702 | 2001 | 39,506,722 | 2000 | 41,997,858 | 1999 | 44,387,060 | 1998 | 45,554,938 | 1997 | 45,238,557 | 1996 | 44,313,337 | 1995 | 42,980,562 | 1994 | 41,046,195 | 1993 | 38,875,452 | 1992 | 36,435,199 | 1991 | 34,028,098 | 1990 | 31,889,895 | 1989 | 29,918,199 | 1988 | 28,290,691 | 1987 | 26,897,230 | 1986 | 25,950,290 | 1985 | 25,420,064 | 1984 | 25,061,451 | 1983 | 24,883,602 | 1982 | 24,901,857 | 1981 | 24,867,885 | 1980 | 24,816,642 | 1979 | 24,876,670 | 1978 | 24,906,317 | 1977 | 24,672,426 | 1976 | 24,200,591 | 1975 | 23,679,873 | 1974 | 23,121,611 | 1973 | 22,447,629 | 1972 | 21,820,156 | 1971 | 21,253,096 | 1970 | 20,686,694 | 1969 | 20,261,526 | 1968 | 19,835,129 | 1967 | 19,314,736 | 1966 | 18,918,501 | 1965 | 18,551,931 | 1964 | 18,133,138 | 1963 | 17,759,717 | 1962 | 17,484,644 | 1961 | 17,360,971 | 1960 | 17,418,692 |
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