| Year | Value | | 2022 | 12,094,042 | | 2021 | 12,052,443 | | 2020 | 12,013,676 | | 2019 | 11,965,658 | | 2018 | 11,906,992 | | 2017 | 11,839,447 | | 2016 | 11,764,721 | | 2015 | 11,686,611 | | 2014 | 11,603,657 | | 2013 | 11,520,631 | | 2012 | 11,440,039 | | 2011 | 11,373,627 | | 2010 | 11,322,177 | | 2009 | 11,265,318 | | 2008 | 11,203,239 | | 2007 | 11,139,082 | | 2006 | 11,074,950 | | 2005 | 11,002,591 | | 2004 | 10,943,408 | | 2003 | 10,888,334 | | 2002 | 10,832,714 | | 2001 | 10,766,889 | | 2000 | 10,694,847 | | 1999 | 10,612,139 | | 1998 | 10,523,086 | | 1997 | 10,434,198 | | 1996 | 10,342,290 | | 1995 | 10,247,236 | | 1994 | 10,163,013 | | 1993 | 10,064,017 | | 1992 | 9,971,852 | | 1991 | 9,877,882 | | 1990 | 9,774,888 | | 1989 | 9,653,438 | | 1988 | 9,527,458 | | 1987 | 9,423,040 | | 1986 | 9,314,124 | | 1985 | 9,192,299 | | 1984 | 9,066,328 | | 1983 | 8,941,613 | | 1982 | 8,812,438 | | 1981 | 8,696,019 | | 1980 | 8,578,597 | | 1979 | 8,453,929 | | 1978 | 8,317,792 | | 1977 | 8,169,541 | | 1976 | 8,017,656 | | 1975 | 7,878,383 | | 1974 | 7,748,564 | | 1973 | 7,633,614 | | 1972 | 7,522,847 | | 1971 | 7,430,171 | | 1970 | 7,349,621 | | 1969 | 7,273,364 | | 1968 | 7,197,806 | | 1967 | 7,117,248 | | 1966 | 7,043,321 | | 1965 | 6,981,743 | | 1964 | 6,917,040 | | 1963 | 6,836,786 | | 1962 | 6,743,125 | | 1961 | 6,648,082 | | 1960 | 6,567,737 |
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