Year | Value | 2022 | 51,427,096 | 2021 | 50,200,682 | 2020 | 48,621,247 | 2019 | 46,420,040 | 2018 | 43,855,491 | 2017 | 40,916,204 | 2016 | 38,011,588 | 2015 | 35,379,245 | 2014 | 32,919,778 | 2013 | 30,953,532 | 2012 | 29,380,783 | 2011 | 28,227,021 | 2010 | 27,401,081 | 2009 | 26,775,529 | 2008 | 26,323,566 | 2007 | 26,011,595 | 2006 | 25,693,526 | 2005 | 25,424,599 | 2004 | 25,282,262 | 2003 | 25,153,824 | 2002 | 24,845,662 | 2001 | 24,289,338 | 2000 | 23,608,223 | 1999 | 22,883,009 | 1998 | 22,104,465 | 1997 | 21,360,678 | 1996 | 20,679,507 | 1995 | 20,040,434 | 1994 | 19,490,321 | 1993 | 18,927,556 | 1992 | 18,320,701 | 1991 | 17,829,533 | 1990 | 17,372,639 | 1989 | 16,812,785 | 1988 | 16,231,967 | 1987 | 15,762,640 | 1986 | 15,372,504 | 1985 | 14,988,223 | 1984 | 14,671,127 | 1983 | 14,434,943 | 1982 | 14,128,792 | 1981 | 13,723,436 | 1980 | 13,328,005 | 1979 | 12,959,676 | 1978 | 12,600,609 | 1977 | 12,305,503 | 1976 | 12,111,404 | 1975 | 11,942,938 | 1974 | 11,711,116 | 1973 | 11,457,394 | 1972 | 11,236,208 | 1971 | 10,982,340 | 1970 | 10,642,458 | 1969 | 10,236,922 | 1968 | 9,800,909 | 1967 | 9,395,589 | 1966 | 9,036,359 | 1965 | 8,750,757 | 1964 | 8,610,261 | 1963 | 8,552,296 | 1962 | 8,467,679 | 1961 | 8,398,472 | 1960 | 8,403,525 |
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