| Year | Value | | 2022 | 349,909 | | 2021 | 349,402 | | 2020 | 349,282 | | 2019 | 347,975 | | 2018 | 344,504 | | 2017 | 339,644 | | 2016 | 335,906 | | 2015 | 330,738 | | 2014 | 324,907 | | 2013 | 318,823 | | 2012 | 312,441 | | 2011 | 305,957 | | 2010 | 299,787 | | 2009 | 294,280 | | 2008 | 289,453 | | 2007 | 285,595 | | 2006 | 283,082 | | 2005 | 280,343 | | 2004 | 277,670 | | 2003 | 275,251 | | 2002 | 272,729 | | 2001 | 270,125 | | 2000 | 267,913 | | 1999 | 266,087 | | 1998 | 264,509 | | 1997 | 263,026 | | 1996 | 256,080 | | 1995 | 248,270 | | 1994 | 239,608 | | 1993 | 230,257 | | 1992 | 220,498 | | 1991 | 210,712 | | 1990 | 201,226 |
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