| Year | Value | | 2023 | 3,270,808 | | 2022 | 3,251,428 | | 2021 | 3,236,395 | | 2020 | 3,260,064 | | 2019 | 3,303,010 | | 2018 | 3,308,267 | | 2017 | 3,275,056 | | 2016 | 3,240,256 | | 2015 | 3,195,327 | | 2014 | 3,139,035 | | 2013 | 3,105,272 | | 2012 | 3,101,917 | | 2011 | 3,116,928 | | 2010 | 3,143,682 | | 2009 | 3,174,217 | | 2008 | 3,191,466 | | 2007 | 3,173,724 | | 2006 | 3,152,924 | | 2005 | 3,085,099 | | 2004 | 3,008,855 | | 2003 | 2,935,421 | | 2002 | 2,873,621 | | 2001 | 2,824,723 | | 2000 | 2,785,889 | | 1999 | 2,751,532 | | 1998 | 2,715,168 | | 1997 | 2,674,643 | | 1996 | 2,629,070 | | 1995 | 2,579,272 | | 1994 | 2,524,655 | | 1993 | 2,466,182 | | 1992 | 2,407,186 | | 1991 | 2,347,936 | | 1990 | 2,283,925 | | 1989 | 2,214,831 | | 1988 | 2,145,151 | | 1987 | 2,076,632 | | 1986 | 2,009,689 | | 1985 | 1,942,612 | | 1984 | 1,875,506 | | 1983 | 1,808,991 | | 1982 | 1,744,226 | | 1981 | 1,692,574 | | 1980 | 1,650,148 | | 1979 | 1,599,507 | | 1978 | 1,543,932 | | 1977 | 1,490,724 | | 1976 | 1,440,590 | | 1975 | 1,399,503 | | 1974 | 1,367,725 |
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