| Year | Value | | 2024 | 1,656,765 | | 2023 | 1,639,723 | | 2022 | 1,626,516 | | 2021 | 1,618,332 | | 2020 | 1,606,531 | | 2019 | 1,579,351 | | 2018 | 1,544,275 | | 2017 | 1,504,628 | | 2016 | 1,459,620 | | 2015 | 1,412,756 | | 2014 | 1,362,017 | | 2013 | 1,307,810 | | 2012 | 1,252,373 | | 2011 | 1,195,077 | | 2010 | 1,137,523 | | 2009 | 1,080,189 | | 2008 | 1,022,172 | | 2007 | 965,012 | | 2006 | 910,790 | | 2005 | 859,411 | | 2004 | 814,369 | | 2003 | 777,385 | | 2002 | 744,426 | | 2001 | 713,608 | | 2000 | 684,600 | | 1999 | 657,057 | | 1998 | 630,656 | | 1997 | 605,164 | | 1996 | 580,135 | | 1995 | 554,495 | | 1994 | 528,738 | | 1993 | 503,703 | | 1992 | 479,192 | | 1991 | 455,822 | | 1990 | 434,004 | | 1989 | 413,655 | | 1988 | 394,726 | | 1987 | 376,647 | | 1986 | 360,050 | | 1985 | 344,451 | | 1984 | 329,054 | | 1983 | 314,852 | | 1982 | 301,872 | | 1981 | 289,964 | | 1980 | 279,015 | | 1979 | 271,332 | | 1978 | 268,166 | | 1977 | 268,636 | | 1976 | 271,651 | | 1975 | 275,443 |
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