Year | Value | 2022 | 55,933,038 | 2021 | 53,070,968 | 2020 | 47,986,658 | 2019 | 43,007,504 | 2018 | 38,227,963 | 2017 | 35,404,615 | 2016 | 36,016,079 | 2015 | 38,286,418 | 2014 | 40,497,048 | 2013 | 41,623,952 | 2012 | 41,398,969 | 2011 | 40,619,154 | 2010 | 39,493,012 | 2009 | 37,818,026 | 2008 | 35,895,179 | 2007 | 33,674,925 | 2006 | 31,456,624 | 2005 | 29,415,946 | 2004 | 27,491,839 | 2003 | 25,924,375 | 2002 | 24,567,438 | 2001 | 23,596,793 | 2000 | 23,003,281 | 1999 | 22,554,896 | 1998 | 22,260,771 | 1997 | 22,136,972 | 1996 | 21,951,190 | 1995 | 21,740,081 | 1994 | 21,643,449 | 1993 | 21,558,172 | 1992 | 21,266,540 | 1991 | 20,769,629 | 1990 | 20,279,628 | 1989 | 19,784,530 | 1988 | 19,173,961 | 1987 | 18,608,154 | 1986 | 18,110,070 | 1985 | 17,620,799 | 1984 | 17,226,561 | 1983 | 16,806,809 | 1982 | 16,300,733 | 1981 | 15,912,383 | 1980 | 15,552,936 | 1979 | 15,057,334 | 1978 | 14,526,872 | 1977 | 14,111,902 | 1976 | 13,774,795 | 1975 | 13,443,678 | 1974 | 13,225,358 | 1973 | 13,119,700 | 1972 | 12,922,185 | 1971 | 12,596,456 | 1970 | 12,243,383 | 1969 | 11,893,929 | 1968 | 11,551,177 | 1967 | 11,283,362 | 1966 | 11,119,484 | 1965 | 10,992,888 | 1964 | 10,889,011 | 1963 | 10,849,154 | 1962 | 10,830,938 | 1961 | 10,844,975 | 1960 | 10,936,325 |
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