Year | Value | 2022 | 12,637,548 | 2021 | 12,544,895 | 2020 | 12,499,552 | 2019 | 12,340,708 | 2018 | 12,192,833 | 2017 | 11,992,014 | 2016 | 11,740,541 | 2015 | 11,466,546 | 2014 | 11,242,018 | 2013 | 11,086,881 | 2012 | 11,018,020 | 2011 | 11,085,619 | 2010 | 11,295,206 | 2009 | 11,514,156 | 2008 | 11,674,255 | 2007 | 11,755,146 | 2006 | 11,745,203 | 2005 | 11,709,850 | 2004 | 11,774,362 | 2003 | 11,948,592 | 2002 | 12,171,771 | 2001 | 12,401,573 | 2000 | 12,606,993 | 1999 | 12,714,953 | 1998 | 12,744,261 | 1997 | 12,729,531 | 1996 | 12,652,955 | 1995 | 12,512,143 | 1994 | 12,327,291 | 1993 | 12,097,106 | 1992 | 11,773,072 | 1991 | 11,587,301 | 1990 | 11,271,792 | 1989 | 10,682,723 | 1988 | 10,247,384 | 1987 | 9,996,398 | 1986 | 9,614,988 | 1985 | 9,212,626 | 1984 | 8,988,443 | 1983 | 8,749,087 | 1982 | 8,415,447 | 1981 | 7,928,304 | 1980 | 7,590,893 | 1979 | 7,437,635 | 1978 | 7,159,687 | 1977 | 6,826,472 | 1976 | 6,678,056 | 1975 | 6,574,191 | 1974 | 6,394,428 | 1973 | 6,366,589 | 1972 | 6,426,100 | 1971 | 6,466,669 | 1970 | 6,577,448 | 1969 | 6,874,763 | 1968 | 7,061,916 | 1967 | 7,109,426 | 1966 | 7,156,905 | 1965 | 7,067,900 | 1964 | 6,818,971 | 1963 | 6,758,795 | 1962 | 6,808,882 | 1961 | 6,680,875 | 1960 | 6,647,487 |
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