| Year | Value | | 2023 | 8,384,561 | | 2022 | 8,299,527 | | 2021 | 8,212,068 | | 2020 | 8,115,527 | | 2019 | 8,021,264 | | 2018 | 7,930,999 | | 2017 | 7,834,347 | | 2016 | 7,731,897 | | 2015 | 7,629,132 | | 2014 | 7,526,346 | | 2013 | 7,421,511 | | 2012 | 7,315,560 | | 2011 | 7,209,608 | | 2010 | 7,104,881 | | 2009 | 7,001,368 | | 2008 | 6,893,678 | | 2007 | 6,775,426 | | 2006 | 6,653,611 | | 2005 | 6,534,657 | | 2004 | 6,416,257 | | 2003 | 6,299,051 | | 2002 | 6,183,561 | | 2001 | 6,069,095 | | 2000 | 5,956,510 | | 1999 | 5,843,626 | | 1998 | 5,730,750 | | 1997 | 5,614,524 | | 1996 | 5,487,409 | | 1995 | 5,353,490 | | 1994 | 5,208,877 | | 1993 | 4,994,432 | | 1992 | 4,693,520 | | 1991 | 4,435,706 | | 1990 | 4,249,932 | | 1989 | 4,069,201 | | 1988 | 3,913,102 | | 1987 | 3,761,124 | | 1986 | 3,596,108 | | 1985 | 3,450,448 | | 1984 | 3,329,805 | | 1983 | 3,204,343 | | 1982 | 3,073,843 | | 1981 | 2,946,970 | | 1980 | 2,864,782 | | 1979 | 2,796,245 | | 1978 | 2,762,829 | | 1977 | 2,811,653 | | 1976 | 2,958,874 | | 1975 | 3,223,398 | | 1974 | 3,366,403 |
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