| Year | Value | | 2024 | 463,692 | | 2023 | 473,246 | | 2022 | 475,784 | | 2021 | 477,575 | | 2020 | 481,390 | | 2019 | 486,794 | | 2018 | 493,203 | | 2017 | 494,660 | | 2016 | 484,303 | | 2015 | 464,131 | | 2014 | 437,774 | | 2013 | 404,723 | | 2012 | 370,924 | | 2011 | 345,559 | | 2010 | 328,601 | | 2009 | 317,540 | | 2008 | 313,885 | | 2007 | 314,272 | | 2006 | 314,755 | | 2005 | 315,079 | | 2004 | 315,090 | | 2003 | 313,765 | | 2002 | 311,285 | | 2001 | 307,785 | | 2000 | 303,126 | | 1999 | 298,080 | | 1998 | 293,676 | | 1997 | 289,886 | | 1996 | 286,244 | | 1995 | 282,349 | | 1994 | 277,561 | | 1993 | 271,597 | | 1992 | 264,310 | | 1991 | 255,623 | | 1990 | 246,187 | | 1989 | 236,870 | | 1988 | 228,221 | | 1987 | 220,872 | | 1986 | 215,345 | | 1985 | 211,335 | | 1984 | 208,163 | | 1983 | 205,471 | | 1982 | 202,837 | | 1981 | 199,872 | | 1980 | 197,243 | | 1979 | 194,905 | | 1978 | 192,133 | | 1977 | 189,206 | | 1976 | 186,498 | | 1975 | 184,105 |
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