| Year | Value | | 2023 | 5,121,381 | | 2022 | 5,137,643 | | 2021 | 5,135,000 | | 2020 | 5,110,146 | | 2019 | 5,076,093 | | 2018 | 5,036,324 | | 2017 | 4,995,509 | | 2016 | 4,949,205 | | 2015 | 4,897,308 | | 2014 | 4,843,397 | | 2013 | 4,787,835 | | 2012 | 4,730,889 | | 2011 | 4,673,150 | | 2010 | 4,617,522 | | 2009 | 4,567,635 | | 2008 | 4,481,467 | | 2007 | 4,398,946 | | 2006 | 4,359,694 | | 2005 | 4,322,172 | | 2004 | 4,288,067 | | 2003 | 4,258,445 | | 2002 | 4,232,123 | | 2001 | 4,206,436 | | 2000 | 4,179,613 | | 1999 | 4,150,048 | | 1998 | 4,112,846 | | 1997 | 4,068,551 | | 1996 | 4,024,032 | | 1995 | 3,977,930 | | 1994 | 3,926,779 | | 1993 | 3,872,373 | | 1992 | 3,815,653 | | 1991 | 3,760,660 | | 1990 | 3,714,277 | | 1989 | 3,666,548 | | 1988 | 3,617,415 | | 1987 | 3,568,379 | | 1986 | 3,514,478 | | 1985 | 3,463,126 | | 1984 | 3,410,333 | | 1983 | 3,353,904 | | 1982 | 3,299,902 | | 1981 | 3,246,858 | | 1980 | 3,194,886 | | 1979 | 3,147,090 | | 1978 | 3,094,067 | | 1977 | 3,036,074 | | 1976 | 2,981,004 | | 1975 | 2,932,119 | | 1974 | 2,885,468 |
|