Year | Value | 2022 | 12,756,021 | 2021 | 12,729,067 | 2020 | 12,546,619 | 2019 | 12,368,060 | 2018 | 12,204,934 | 2017 | 12,040,628 | 2016 | 11,856,774 | 2015 | 11,745,988 | 2014 | 11,742,902 | 2013 | 11,838,250 | 2012 | 12,025,116 | 2011 | 12,315,448 | 2010 | 12,623,783 | 2009 | 12,851,373 | 2008 | 12,921,880 | 2007 | 12,891,451 | 2006 | 12,770,292 | 2005 | 12,514,671 | 2004 | 12,277,434 | 2003 | 12,099,101 | 2002 | 11,876,158 | 2001 | 11,645,375 | 2000 | 11,465,592 | 1999 | 11,308,475 | 1998 | 11,065,132 | 1997 | 10,731,760 | 1996 | 10,337,177 | 1995 | 9,659,235 | 1994 | 8,693,497 | 1993 | 7,756,643 | 1992 | 7,106,638 | 1991 | 6,927,262 | 1990 | 7,327,652 | 1989 | 8,184,138 | 1988 | 9,245,043 | 1987 | 10,243,928 | 1986 | 10,771,486 | 1985 | 10,811,244 | 1984 | 10,503,422 | 1983 | 9,909,005 | 1982 | 9,320,773 | 1981 | 8,945,990 | 1980 | 8,899,288 | 1979 | 9,178,843 | 1978 | 9,657,914 | 1977 | 10,043,722 | 1976 | 10,164,993 | 1975 | 9,948,202 | 1974 | 9,413,746 | 1973 | 8,677,710 | 1972 | 7,804,758 | 1971 | 6,943,110 | 1970 | 6,202,000 | 1969 | 5,607,590 | 1968 | 5,209,150 | 1967 | 4,906,687 | 1966 | 4,646,743 | 1965 | 4,546,425 | 1964 | 4,632,606 | 1963 | 4,785,173 | 1962 | 5,037,738 | 1961 | 5,364,167 | 1960 | 5,606,818 |
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