| Year | Value | | 2022 | 3,837,156 | | 2021 | 3,725,949 | | 2020 | 3,647,466 | | 2019 | 3,573,381 | | 2018 | 3,490,777 | | 2017 | 3,426,364 | | 2016 | 3,401,244 | | 2015 | 3,425,159 | | 2014 | 3,501,627 | | 2013 | 3,610,276 | | 2012 | 3,780,970 | | 2011 | 4,058,248 | | 2010 | 4,364,375 | | 2009 | 4,708,651 | | 2008 | 5,110,617 | | 2007 | 5,513,022 | | 2006 | 5,864,783 | | 2005 | 6,111,197 | | 2004 | 6,288,989 | | 2003 | 6,450,369 | | 2002 | 6,489,763 | | 2001 | 6,371,584 | | 2000 | 6,234,351 | | 1999 | 6,091,887 | | 1998 | 5,890,039 | | 1997 | 5,699,593 | | 1996 | 5,589,217 | | 1995 | 5,515,033 | | 1994 | 5,436,435 | | 1993 | 5,357,290 | | 1992 | 5,298,724 | | 1991 | 5,254,155 | | 1990 | 5,208,070 | | 1989 | 5,182,747 | | 1988 | 5,096,862 | | 1987 | 4,955,521 | | 1986 | 4,835,581 | | 1985 | 4,785,747 | | 1984 | 4,814,246 | | 1983 | 4,959,546 | | 1982 | 5,217,559 | | 1981 | 5,540,320 | | 1980 | 5,902,896 | | 1979 | 6,234,487 | | 1978 | 6,477,267 | | 1977 | 6,600,781 | | 1976 | 6,600,458 | | 1975 | 6,536,805 | | 1974 | 6,478,565 | | 1973 | 6,394,968 | | 1972 | 6,317,059 | | 1971 | 6,296,325 | | 1970 | 6,297,952 | | 1969 | 6,297,455 | | 1968 | 6,222,501 | | 1967 | 6,050,726 | | 1966 | 5,823,868 | | 1965 | 5,378,768 | | 1964 | 4,636,589 | | 1963 | 3,880,325 | | 1962 | 3,324,507 | | 1961 | 3,135,629 | | 1960 | 3,434,055 |
|