| Year | Value | | 2022 | 3,366,994 | | 2021 | 3,386,514 | | 2020 | 3,386,916 | | 2019 | 3,370,097 | | 2018 | 3,351,137 | | 2017 | 3,346,138 | | 2016 | 3,368,297 | | 2015 | 3,431,778 | | 2014 | 3,542,566 | | 2013 | 3,690,742 | | 2012 | 3,849,202 | | 2011 | 3,995,963 | | 2010 | 4,109,706 | | 2009 | 4,175,787 | | 2008 | 4,208,654 | | 2007 | 4,224,614 | | 2006 | 4,230,518 | | 2005 | 4,236,041 | | 2004 | 4,245,069 | | 2003 | 4,256,285 | | 2002 | 4,264,336 | | 2001 | 4,261,740 | | 2000 | 4,241,608 | | 1999 | 4,188,206 | | 1998 | 4,104,995 | | 1997 | 4,012,421 | | 1996 | 3,919,094 | | 1995 | 3,833,046 | | 1994 | 3,753,328 | | 1993 | 3,682,835 | | 1992 | 3,614,147 | | 1991 | 3,530,187 | | 1990 | 3,431,582 | | 1989 | 3,325,649 | | 1988 | 3,213,639 | | 1987 | 3,101,411 | | 1986 | 3,009,372 | | 1985 | 2,951,899 | | 1984 | 2,925,945 | | 1983 | 2,922,318 | | 1982 | 2,933,341 | | 1981 | 2,910,354 | | 1980 | 2,875,253 | | 1979 | 2,871,545 | | 1978 | 2,847,669 | | 1977 | 2,797,986 | | 1976 | 2,760,172 | | 1975 | 2,693,838 | | 1974 | 2,598,495 | | 1973 | 2,494,440 | | 1972 | 2,379,902 | | 1971 | 2,263,309 | | 1970 | 2,159,616 | | 1969 | 2,071,550 | | 1968 | 1,959,576 | | 1967 | 1,817,176 | | 1966 | 1,688,979 | | 1965 | 1,570,789 | | 1964 | 1,430,976 | | 1963 | 1,328,438 | | 1962 | 1,273,539 | | 1961 | 1,233,262 | | 1960 | 1,202,883 |
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