| Year | Value | | 2024 | 337,295 | | 2023 | 345,854 | | 2022 | 351,707 | | 2021 | 354,525 | | 2020 | 354,344 | | 2019 | 352,691 | | 2018 | 352,609 | | 2017 | 356,814 | | 2016 | 367,133 | | 2015 | 383,302 | | 2014 | 403,623 | | 2013 | 423,076 | | 2012 | 435,116 | | 2011 | 437,622 | | 2010 | 434,101 | | 2009 | 426,312 | | 2008 | 415,525 | | 2007 | 405,222 | | 2006 | 392,554 | | 2005 | 376,585 | | 2004 | 362,020 | | 2003 | 352,426 | | 2002 | 351,176 | | 2001 | 361,520 | | 2000 | 381,963 | | 1999 | 409,476 | | 1998 | 443,073 | | 1997 | 480,211 | | 1996 | 516,252 | | 1995 | 547,317 | | 1994 | 571,599 | | 1993 | 587,502 | | 1992 | 596,124 | | 1991 | 601,301 | | 1990 | 605,119 | | 1989 | 607,433 | | 1988 | 606,355 | | 1987 | 599,173 | | 1986 | 583,396 | | 1985 | 558,465 | | 1984 | 526,349 | | 1983 | 490,643 | | 1982 | 455,751 | | 1981 | 425,888 | | 1980 | 406,361 | | 1979 | 397,303 | | 1978 | 393,863 | | 1977 | 393,040 | | 1976 | 392,304 | | 1975 | 390,671 |
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