Year | Value | 2022 | 15,759,894 | 2021 | 15,726,337 | 2020 | 15,462,858 | 2019 | 15,208,414 | 2018 | 15,006,867 | 2017 | 14,834,936 | 2016 | 14,635,727 | 2015 | 14,506,558 | 2014 | 14,500,658 | 2013 | 14,595,699 | 2012 | 14,790,122 | 2011 | 15,131,856 | 2010 | 15,539,596 | 2009 | 15,901,886 | 2008 | 16,123,145 | 2007 | 16,246,852 | 2006 | 16,277,380 | 2005 | 16,160,638 | 2004 | 16,019,554 | 2003 | 15,860,480 | 2002 | 15,622,010 | 2001 | 15,363,848 | 2000 | 15,114,051 | 1999 | 14,876,987 | 1998 | 14,537,864 | 1997 | 14,069,584 | 1996 | 13,511,088 | 1995 | 12,602,202 | 1994 | 11,337,368 | 1993 | 10,132,716 | 1992 | 9,305,931 | 1991 | 9,075,639 | 1990 | 9,567,614 | 1989 | 10,618,864 | 1988 | 11,925,563 | 1987 | 13,150,386 | 1986 | 13,814,631 | 1985 | 13,888,892 | 1984 | 13,504,595 | 1983 | 12,786,317 | 1982 | 12,130,995 | 1981 | 11,714,342 | 1980 | 11,670,856 | 1979 | 12,013,552 | 1978 | 12,590,103 | 1977 | 13,072,941 | 1976 | 13,356,567 | 1975 | 13,441,023 | 1974 | 13,294,621 | 1973 | 12,991,064 | 1972 | 12,519,902 | 1971 | 11,869,763 | 1970 | 10,955,810 | 1969 | 10,005,901 | 1968 | 9,285,285 | 1967 | 8,599,625 | 1966 | 8,045,144 | 1965 | 7,879,300 | 1964 | 8,108,063 | 1963 | 8,491,124 | 1962 | 9,067,323 | 1961 | 9,728,963 | 1960 | 10,186,154 |
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