Year | Value | 2022 | 13,562,333 | 2021 | 13,515,181 | 2020 | 13,294,362 | 2019 | 13,074,799 | 2018 | 12,877,633 | 2017 | 12,692,565 | 2016 | 12,512,988 | 2015 | 12,435,327 | 2014 | 12,484,123 | 2013 | 12,640,169 | 2012 | 12,887,532 | 2011 | 13,227,426 | 2010 | 13,576,408 | 2009 | 13,847,752 | 2008 | 13,966,305 | 2007 | 13,972,732 | 2006 | 13,889,813 | 2005 | 13,682,390 | 2004 | 13,480,737 | 2003 | 13,299,494 | 2002 | 13,062,379 | 2001 | 12,809,100 | 2000 | 12,568,952 | 1999 | 12,349,513 | 1998 | 12,053,633 | 1997 | 11,650,206 | 1996 | 11,177,646 | 1995 | 10,407,035 | 1994 | 9,314,837 | 1993 | 8,265,777 | 1992 | 7,569,414 | 1991 | 7,421,565 | 1990 | 7,914,713 | 1989 | 8,909,318 | 1988 | 10,145,935 | 1987 | 11,294,763 | 1986 | 11,889,305 | 1985 | 11,915,472 | 1984 | 11,512,428 | 1983 | 10,786,997 | 1982 | 10,115,638 | 1981 | 9,684,984 | 1980 | 9,624,160 | 1979 | 9,940,867 | 1978 | 10,496,778 | 1977 | 10,980,316 | 1976 | 11,280,948 | 1975 | 11,378,358 | 1974 | 11,244,893 | 1973 | 10,953,765 | 1972 | 10,497,197 | 1971 | 9,885,572 | 1970 | 9,051,435 | 1969 | 8,212,110 | 1968 | 7,646,437 | 1967 | 7,142,831 | 1966 | 6,727,144 | 1965 | 6,633,996 | 1964 | 6,865,881 | 1963 | 7,180,709 | 1962 | 7,644,670 | 1961 | 8,193,179 | 1960 | 8,558,879 |
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