| Year | Value | | 2022 | 17,203,323 | | 2021 | 16,647,858 | | 2020 | 16,092,134 | | 2019 | 15,529,141 | | 2018 | 14,973,763 | | 2017 | 14,440,356 | | 2016 | 13,934,257 | | 2015 | 13,441,442 | | 2014 | 12,957,671 | | 2013 | 12,496,455 | | 2012 | 12,058,524 | | 2011 | 11,649,067 | | 2010 | 11,274,096 | | 2009 | 10,930,833 | | 2008 | 10,619,200 | | 2007 | 10,335,584 | | 2006 | 10,069,179 | | 2005 | 9,807,481 | | 2004 | 9,529,956 | | 2003 | 9,250,157 | | 2002 | 9,006,853 | | 2001 | 8,795,223 | | 2000 | 8,596,502 | | 1999 | 8,418,808 | | 1998 | 8,244,767 | | 1997 | 8,040,012 | | 1996 | 7,818,217 | | 1995 | 7,602,707 | | 1994 | 7,407,854 | | 1993 | 7,239,451 | | 1992 | 7,083,419 | | 1991 | 6,927,339 | | 1990 | 6,769,365 | | 1989 | 6,612,688 | | 1988 | 6,466,478 | | 1987 | 6,326,476 | | 1986 | 6,185,537 | | 1985 | 6,070,895 | | 1984 | 5,974,952 | | 1983 | 5,873,407 | | 1982 | 5,764,350 | | 1981 | 5,647,481 | | 1980 | 5,546,927 | | 1979 | 5,444,061 | | 1978 | 5,315,444 | | 1977 | 5,191,075 | | 1976 | 5,076,840 | | 1975 | 4,961,379 | | 1974 | 4,846,298 | | 1973 | 4,732,013 | | 1972 | 4,619,443 | | 1971 | 4,509,269 | | 1970 | 4,399,815 | | 1969 | 4,295,073 | | 1968 | 4,196,657 | | 1967 | 4,102,836 | | 1966 | 4,012,070 | | 1965 | 3,923,820 | | 1964 | 3,838,272 | | 1963 | 3,756,175 | | 1962 | 3,677,091 | | 1961 | 3,599,523 | | 1960 | 3,525,985 |
|