| Year | Value | | 2023 | 3,423,217 | | 2022 | 3,400,597 | | 2021 | 3,374,996 | | 2020 | 3,384,133 | | 2019 | 3,416,488 | | 2018 | 3,417,272 | | 2017 | 3,384,520 | | 2016 | 3,350,889 | | 2015 | 3,307,812 | | 2014 | 3,253,990 | | 2013 | 3,220,628 | | 2012 | 3,215,434 | | 2011 | 3,226,975 | | 2010 | 3,246,995 | | 2009 | 3,267,725 | | 2008 | 3,273,976 | | 2007 | 3,247,779 | | 2006 | 3,222,699 | | 2005 | 3,151,582 | | 2004 | 3,074,195 | | 2003 | 3,002,333 | | 2002 | 2,945,497 | | 2001 | 2,904,073 | | 2000 | 2,873,395 | | 1999 | 2,847,184 | | 1998 | 2,819,616 | | 1997 | 2,789,248 | | 1996 | 2,755,938 | | 1995 | 2,720,922 | | 1994 | 2,679,143 | | 1993 | 2,628,973 | | 1992 | 2,575,133 | | 1991 | 2,516,891 | | 1990 | 2,449,042 | | 1989 | 2,372,050 | | 1988 | 2,292,254 | | 1987 | 2,212,968 | | 1986 | 2,135,775 | | 1985 | 2,059,971 | | 1984 | 1,985,714 | | 1983 | 1,912,621 | | 1982 | 1,840,980 | | 1981 | 1,781,495 | | 1980 | 1,730,338 | | 1979 | 1,680,735 | | 1978 | 1,635,521 | | 1977 | 1,591,209 | | 1976 | 1,548,450 | | 1975 | 1,501,887 | | 1974 | 1,450,308 |
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