Year | Value | 2022 | 17,059,015 | 2021 | 16,873,889 | 2020 | 16,763,159 | 2019 | 16,729,064 | 2018 | 16,774,133 | 2017 | 16,918,080 | 2016 | 17,133,223 | 2015 | 17,385,855 | 2014 | 17,636,205 | 2013 | 17,809,535 | 2012 | 17,910,863 | 2011 | 17,981,937 | 2010 | 17,985,765 | 2009 | 17,903,541 | 2008 | 17,766,964 | 2007 | 17,528,276 | 2006 | 17,161,412 | 2005 | 16,723,747 | 2004 | 16,242,165 | 2003 | 15,718,025 | 2002 | 15,213,508 | 2001 | 14,712,043 | 2000 | 14,168,662 | 1999 | 13,624,857 | 1998 | 13,113,428 | 1997 | 12,646,220 | 1996 | 12,235,388 | 1995 | 11,882,571 | 1994 | 11,572,266 | 1993 | 11,347,126 | 1992 | 11,142,173 | 1991 | 10,876,885 | 1990 | 10,545,825 | 1989 | 10,130,759 | 1988 | 9,864,876 | 1987 | 9,607,147 | 1986 | 9,331,330 | 1985 | 9,037,716 | 1984 | 8,741,391 | 1983 | 8,443,494 | 1982 | 8,155,415 | 1981 | 7,820,553 | 1980 | 7,503,766 | 1979 | 7,267,701 | 1978 | 7,062,260 | 1977 | 6,863,491 | 1976 | 6,640,766 | 1975 | 6,418,425 | 1974 | 6,196,177 | 1973 | 5,956,099 | 1972 | 5,705,460 | 1971 | 5,458,854 | 1970 | 5,211,920 | 1969 | 4,951,495 | 1968 | 4,699,534 | 1967 | 4,478,526 | 1966 | 4,287,383 | 1965 | 4,137,356 | 1964 | 4,032,030 | 1963 | 3,967,805 | 1962 | 3,935,190 | 1961 | 3,919,060 | 1960 | 3,907,457 |
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