| Year | Value | | 2023 | 405,086 | | 2022 | 399,122 | | 2021 | 391,180 | | 2020 | 383,785 | | 2019 | 381,189 | | 2018 | 376,388 | | 2017 | 371,733 | | 2016 | 367,503 | | 2015 | 363,885 | | 2014 | 359,803 | | 2013 | 356,398 | | 2012 | 353,558 | | 2011 | 350,879 | | 2010 | 348,073 | | 2009 | 344,805 | | 2008 | 340,887 | | 2007 | 336,723 | | 2006 | 332,638 | | 2005 | 328,772 | | 2004 | 324,619 | | 2003 | 319,956 | | 2002 | 314,906 | | 2001 | 309,402 | | 2000 | 303,654 | | 1999 | 297,888 | | 1998 | 291,865 | | 1997 | 285,809 | | 1996 | 278,939 | | 1995 | 270,924 | | 1994 | 274,185 | | 1993 | 278,206 | | 1992 | 269,011 | | 1991 | 256,568 |
|