| Year | Value | | 2025 | 571,250 | | 2024 | 559,113 | | 2023 | 547,366 | | 2022 | 535,970 | | 2021 | 528,320 | | 2020 | 516,321 | | 2019 | 504,958 | | 2018 | 494,063 | | 2017 | 483,794 | | 2016 | 475,376 | | 2015 | 468,018 | | 2014 | 522,201 | | 2013 | 571,749 | | 2012 | 626,222 | | 2011 | 685,844 | | 2010 | 750,264 | | 2009 | 776,068 | | 2008 | 801,039 | | 2007 | 825,584 | | 2006 | 849,740 | | 2005 | 873,562 | | 2004 | 899,565 | | 2003 | 928,464 | | 2002 | 957,680 | | 2001 | 986,743 | | 2000 | 1,015,461 | | 1999 | 1,043,797 | | 1998 | 954,840 | | 1997 | 873,295 | | 1996 | 798,620 | | 1995 | 729,446 | | 1994 | 665,717 | | 1993 | 633,899 | | 1992 | 610,421 | | 1991 | 580,399 | | 1990 | 556,008 |
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