| Year | Value | | 2022 | 16,099,042 | | 2021 | 15,787,282 | | 2020 | 15,410,735 | | 2019 | 14,977,615 | | 2018 | 14,507,793 | | 2017 | 14,041,963 | | 2016 | 13,584,041 | | 2015 | 13,124,407 | | 2014 | 12,655,030 | | 2013 | 12,192,825 | | 2012 | 11,778,825 | | 2011 | 11,419,996 | | 2010 | 11,093,148 | | 2009 | 10,789,760 | | 2008 | 10,518,677 | | 2007 | 10,251,812 | | 2006 | 9,978,283 | | 2005 | 9,708,452 | | 2004 | 9,440,755 | | 2003 | 9,177,388 | | 2002 | 8,934,307 | | 2001 | 8,673,898 | | 2000 | 8,379,499 | | 1999 | 8,087,328 | | 1998 | 7,797,695 | | 1997 | 7,519,045 | | 1996 | 7,280,231 | | 1995 | 7,065,556 | | 1994 | 6,851,722 | | 1993 | 6,669,635 | | 1992 | 6,490,283 | | 1991 | 6,266,062 | | 1990 | 6,003,778 | | 1989 | 5,703,454 | | 1988 | 5,465,640 | | 1987 | 5,227,182 | | 1986 | 4,994,117 | | 1985 | 4,764,983 | | 1984 | 4,533,218 | | 1983 | 4,309,836 | | 1982 | 4,110,932 | | 1981 | 3,919,522 | | 1980 | 3,761,814 | | 1979 | 3,660,294 | | 1978 | 3,604,167 | | 1977 | 3,575,694 | | 1976 | 3,544,542 | | 1975 | 3,513,578 | | 1974 | 3,490,365 | | 1973 | 3,464,952 | | 1972 | 3,431,614 | | 1971 | 3,393,215 | | 1970 | 3,350,158 | | 1969 | 3,299,012 | | 1968 | 3,237,841 | | 1967 | 3,170,428 | | 1966 | 3,101,795 | | 1965 | 3,036,396 | | 1964 | 2,973,883 | | 1963 | 2,912,977 | | 1962 | 2,851,582 | | 1961 | 2,785,281 | | 1960 | 2,712,246 |
|