| Year | Value | | 2022 | 17,304,793 | | 2021 | 17,024,532 | | 2020 | 16,700,174 | | 2019 | 16,306,642 | | 2018 | 15,868,611 | | 2017 | 15,416,619 | | 2016 | 14,957,284 | | 2015 | 14,494,925 | | 2014 | 14,030,323 | | 2013 | 13,570,511 | | 2012 | 13,117,680 | | 2011 | 12,675,764 | | 2010 | 12,251,983 | | 2009 | 11,846,570 | | 2008 | 11,421,586 | | 2007 | 10,988,623 | | 2006 | 10,557,908 | | 2005 | 10,124,215 | | 2004 | 9,701,474 | | 2003 | 9,319,402 | | 2002 | 8,981,885 | | 2001 | 8,680,694 | | 2000 | 8,415,684 | | 1999 | 8,180,827 | | 1998 | 7,965,808 | | 1997 | 7,760,594 | | 1996 | 7,562,939 | | 1995 | 7,371,915 | | 1994 | 7,186,379 | | 1993 | 7,012,333 | | 1992 | 6,854,384 | | 1991 | 6,709,072 | | 1990 | 6,574,307 | | 1989 | 6,448,488 | | 1988 | 6,324,740 | | 1987 | 6,195,525 | | 1986 | 6,056,543 | | 1985 | 5,906,401 | | 1984 | 5,745,470 | | 1983 | 5,573,014 | | 1982 | 5,391,906 | | 1981 | 5,210,239 | | 1980 | 5,033,580 | | 1979 | 4,860,450 | | 1978 | 4,689,841 | | 1977 | 4,528,094 | | 1976 | 4,384,145 | | 1975 | 4,261,583 | | 1974 | 4,159,338 | | 1973 | 4,075,759 | | 1972 | 4,004,236 | | 1971 | 3,933,412 | | 1970 | 3,855,068 | | 1969 | 3,765,959 | | 1968 | 3,664,216 | | 1967 | 3,552,419 | | 1966 | 3,437,763 | | 1965 | 3,325,157 | | 1964 | 3,216,959 | | 1963 | 3,116,220 | | 1962 | 3,023,757 | | 1961 | 2,936,747 | | 1960 | 2,853,188 |
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