| Year | Value | | 2024 | 517,019 | | 2023 | 520,273 | | 2022 | 524,402 | | 2021 | 539,092 | | 2020 | 566,607 | | 2019 | 595,719 | | 2018 | 624,169 | | 2017 | 649,527 | | 2016 | 660,108 | | 2015 | 652,440 | | 2014 | 637,215 | | 2013 | 618,983 | | 2012 | 600,009 | | 2011 | 576,346 | | 2010 | 551,130 | | 2009 | 527,784 | | 2008 | 502,841 | | 2007 | 478,340 | | 2006 | 452,688 | | 2005 | 428,101 | | 2004 | 408,153 | | 2003 | 389,034 | | 2002 | 369,158 | | 2001 | 351,675 | | 2000 | 337,127 | | 1999 | 320,840 | | 1998 | 299,550 | | 1997 | 278,526 | | 1996 | 262,830 | | 1995 | 253,985 | | 1994 | 256,368 | | 1993 | 268,962 | | 1992 | 292,482 | | 1991 | 305,617 | | 1990 | 301,308 | | 1989 | 297,459 | | 1988 | 294,994 | | 1987 | 295,846 | | 1986 | 294,128 | | 1985 | 287,398 | | 1984 | 279,296 | | 1983 | 264,721 | | 1982 | 243,080 | | 1981 | 221,715 | | 1980 | 188,643 | | 1979 | 160,358 | | 1978 | 159,875 | | 1977 | 165,248 | | 1976 | 164,084 | | 1975 | 159,937 |
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