| Year | Value | | 2023 | 1,335,012 | | 2022 | 1,321,226 | | 2021 | 1,311,407 | | 2020 | 1,322,423 | | 2019 | 1,335,714 | | 2018 | 1,328,001 | | 2017 | 1,299,292 | | 2016 | 1,255,867 | | 2015 | 1,212,293 | | 2014 | 1,165,795 | | 2013 | 1,120,807 | | 2012 | 1,087,280 | | 2011 | 1,075,052 | | 2010 | 1,075,702 | | 2009 | 1,044,748 | | 2008 | 982,987 | | 2007 | 920,746 | | 2006 | 858,852 | | 2005 | 797,497 | | 2004 | 736,762 | | 2003 | 687,846 | | 2002 | 661,316 | | 2001 | 645,321 | | 2000 | 628,716 | | 1999 | 611,679 | | 1998 | 594,335 | | 1997 | 576,819 | | 1996 | 559,261 | | 1995 | 541,760 | | 1994 | 524,389 | | 1993 | 507,171 | | 1992 | 490,140 | | 1991 | 472,927 | | 1990 | 456,052 | | 1989 | 440,052 | | 1988 | 424,148 | | 1987 | 408,510 | | 1986 | 393,278 | | 1985 | 378,580 | | 1984 | 364,509 | | 1983 | 351,107 | | 1982 | 338,351 | | 1981 | 325,786 | | 1980 | 312,198 | | 1979 | 297,750 | | 1978 | 283,456 | | 1977 | 269,405 | | 1976 | 255,655 | | 1975 | 242,277 | | 1974 | 229,332 |
|