| Year | Value | | 2022 | 9,340,352 | | 2021 | 9,194,011 | | 2020 | 9,007,612 | | 2019 | 8,738,598 | | 2018 | 8,466,044 | | 2017 | 8,218,560 | | 2016 | 7,986,888 | | 2015 | 7,758,295 | | 2014 | 7,528,797 | | 2013 | 7,300,428 | | 2012 | 7,075,659 | | 2011 | 6,866,040 | | 2010 | 6,683,157 | | 2009 | 6,521,578 | | 2008 | 6,371,634 | | 2007 | 6,228,538 | | 2006 | 6,081,271 | | 2005 | 5,922,081 | | 2004 | 5,750,647 | | 2003 | 5,566,104 | | 2002 | 5,370,815 | | 2001 | 5,173,243 | | 2000 | 4,981,149 | | 1999 | 4,795,552 | | 1998 | 4,623,194 | | 1997 | 4,470,569 | | 1996 | 4,332,478 | | 1995 | 4,203,799 | | 1994 | 4,083,485 | | 1993 | 3,969,676 | | 1992 | 3,862,859 | | 1991 | 3,768,082 | | 1990 | 3,685,935 | | 1989 | 3,614,589 | | 1988 | 3,554,416 | | 1987 | 3,500,435 | | 1986 | 3,442,042 | | 1985 | 3,373,382 | | 1984 | 3,294,693 | | 1983 | 3,203,024 | | 1982 | 3,100,797 | | 1981 | 3,001,406 | | 1980 | 2,911,852 | | 1979 | 2,830,220 | | 1978 | 2,758,937 | | 1977 | 2,693,388 | | 1976 | 2,617,935 | | 1975 | 2,524,002 | | 1974 | 2,415,194 | | 1973 | 2,291,268 | | 1972 | 2,159,376 | | 1971 | 2,051,487 | | 1970 | 1,972,212 | | 1969 | 1,911,498 | | 1968 | 1,881,260 | | 1967 | 1,877,034 | | 1966 | 1,872,087 | | 1965 | 1,842,709 | | 1964 | 1,783,121 | | 1963 | 1,691,084 | | 1962 | 1,577,420 | | 1961 | 1,472,798 | | 1960 | 1,400,466 |
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