| Year | Value | | 2024 | 447,125 | | 2023 | 456,478 | | 2022 | 461,830 | | 2021 | 463,108 | | 2020 | 457,781 | | 2019 | 447,914 | | 2018 | 436,282 | | 2017 | 424,434 | | 2016 | 412,108 | | 2015 | 398,316 | | 2014 | 383,398 | | 2013 | 369,650 | | 2012 | 357,630 | | 2011 | 346,283 | | 2010 | 335,534 | | 2009 | 325,474 | | 2008 | 312,348 | | 2007 | 300,974 | | 2006 | 295,232 | | 2005 | 294,052 | | 2004 | 296,650 | | 2003 | 301,335 | | 2002 | 305,381 | | 2001 | 307,660 | | 2000 | 309,630 | | 1999 | 311,641 | | 1998 | 313,356 | | 1997 | 315,384 | | 1996 | 319,522 | | 1995 | 324,060 | | 1994 | 327,317 | | 1993 | 326,282 | | 1992 | 320,524 | | 1991 | 310,740 | | 1990 | 297,124 | | 1989 | 281,273 | | 1988 | 262,995 | | 1987 | 244,450 | | 1986 | 227,617 | | 1985 | 211,285 | | 1984 | 195,650 | | 1983 | 184,491 | | 1982 | 176,346 | | 1981 | 164,694 | | 1980 | 148,300 | | 1979 | 130,298 | | 1978 | 112,795 | | 1977 | 100,750 | | 1976 | 101,588 | | 1975 | 113,155 |
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