| Year | Value | | 2024 | 341,585 | | 2023 | 351,039 | | 2022 | 357,877 | | 2021 | 369,099 | | 2020 | 381,225 | | 2019 | 393,036 | | 2018 | 417,098 | | 2017 | 450,184 | | 2016 | 471,529 | | 2015 | 474,914 | | 2014 | 463,221 | | 2013 | 447,170 | | 2012 | 431,871 | | 2011 | 420,827 | | 2010 | 413,645 | | 2009 | 408,465 | | 2008 | 392,699 | | 2007 | 367,317 | | 2006 | 344,076 | | 2005 | 323,568 | | 2004 | 307,259 | | 2003 | 297,969 | | 2002 | 299,420 | | 2001 | 310,905 | | 2000 | 328,593 | | 1999 | 350,447 | | 1998 | 376,829 | | 1997 | 401,220 | | 1996 | 420,567 | | 1995 | 438,931 | | 1994 | 457,988 | | 1993 | 473,229 | | 1992 | 478,707 | | 1991 | 476,720 | | 1990 | 471,862 | | 1989 | 462,235 | | 1988 | 449,114 | | 1987 | 441,225 | | 1986 | 437,836 | | 1985 | 433,507 | | 1984 | 427,983 | | 1983 | 411,009 | | 1982 | 389,223 | | 1981 | 374,106 | | 1980 | 361,005 | | 1979 | 349,619 | | 1978 | 350,193 | | 1977 | 357,881 | | 1976 | 362,007 | | 1975 | 365,376 |
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