| Year | Value | | 2022 | 6,716,401 | | 2021 | 6,647,448 | | 2020 | 6,593,177 | | 2019 | 6,545,477 | | 2018 | 6,501,878 | | 2017 | 6,447,895 | | 2016 | 6,370,586 | | 2015 | 6,267,627 | | 2014 | 6,138,748 | | 2013 | 5,987,526 | | 2012 | 5,822,481 | | 2011 | 5,649,780 | | 2010 | 5,474,083 | | 2009 | 5,299,125 | | 2008 | 5,125,798 | | 2007 | 4,956,471 | | 2006 | 4,794,493 | | 2005 | 4,639,995 | | 2004 | 4,491,544 | | 2003 | 4,333,176 | | 2002 | 4,155,345 | | 2001 | 3,966,312 | | 2000 | 3,770,546 | | 1999 | 3,578,490 | | 1998 | 3,413,731 | | 1997 | 3,285,295 | | 1996 | 3,182,673 | | 1995 | 3,099,469 | | 1994 | 3,026,855 | | 1993 | 2,956,867 | | 1992 | 2,885,368 | | 1991 | 2,812,212 | | 1990 | 2,739,894 | | 1989 | 2,669,857 | | 1988 | 2,605,963 | | 1987 | 2,550,591 | | 1986 | 2,500,773 | | 1985 | 2,453,624 | | 1984 | 2,406,555 | | 1983 | 2,355,640 | | 1982 | 2,298,870 | | 1981 | 2,236,199 | | 1980 | 2,169,330 | | 1979 | 2,098,995 | | 1978 | 2,024,993 | | 1977 | 1,948,023 | | 1976 | 1,869,691 | | 1975 | 1,791,420 | | 1974 | 1,714,130 | | 1973 | 1,640,076 | | 1972 | 1,572,607 | | 1971 | 1,514,178 | | 1970 | 1,465,044 | | 1969 | 1,423,363 | | 1968 | 1,386,302 | | 1967 | 1,351,460 | | 1966 | 1,317,237 | | 1965 | 1,281,602 | | 1964 | 1,242,903 | | 1963 | 1,201,581 | | 1962 | 1,158,827 | | 1961 | 1,115,259 | | 1960 | 1,072,557 |
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