| Year | Value | | 2022 | 11,031,286 | | 2021 | 10,786,763 | | 2020 | 10,545,078 | | 2019 | 10,287,647 | | 2018 | 9,995,643 | | 2017 | 9,738,163 | | 2016 | 9,552,623 | | 2015 | 9,431,523 | | 2014 | 9,259,032 | | 2013 | 8,984,203 | | 2012 | 8,698,973 | | 2011 | 8,423,640 | | 2010 | 8,155,352 | | 2009 | 7,805,682 | | 2008 | 7,440,530 | | 2007 | 7,160,953 | | 2006 | 6,921,702 | | 2005 | 6,696,167 | | 2004 | 6,469,754 | | 2003 | 6,249,682 | | 2002 | 6,071,677 | | 2001 | 5,918,664 | | 2000 | 5,787,529 | | 1999 | 5,683,541 | | 1998 | 5,562,773 | | 1997 | 5,472,582 | | 1996 | 5,490,938 | | 1995 | 5,504,970 | | 1994 | 5,194,577 | | 1993 | 5,176,187 | | 1992 | 5,361,916 | | 1991 | 5,233,682 | | 1990 | 5,139,904 | | 1989 | 5,048,750 | | 1988 | 4,964,492 | | 1987 | 4,867,902 | | 1986 | 4,768,597 | | 1985 | 4,689,688 | | 1984 | 4,598,557 | | 1983 | 4,497,270 | | 1982 | 4,387,161 | | 1981 | 4,288,525 | | 1980 | 4,125,700 | | 1979 | 3,964,575 | | 1978 | 3,877,632 | | 1977 | 3,776,693 | | 1976 | 3,689,989 | | 1975 | 3,617,072 | | 1974 | 3,536,433 | | 1973 | 3,455,878 | | 1972 | 3,468,204 | | 1971 | 3,475,683 | | 1970 | 3,398,321 | | 1969 | 3,331,079 | | 1968 | 3,264,866 | | 1967 | 3,192,598 | | 1966 | 3,116,897 | | 1965 | 3,046,604 | | 1964 | 2,965,489 | | 1963 | 2,883,480 | | 1962 | 2,825,203 | | 1961 | 2,756,414 | | 1960 | 2,689,581 |
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