| Year | Value | | 2022 | 333,737 | | 2021 | 333,249 | | 2020 | 333,225 | | 2019 | 332,257 | | 2018 | 329,453 | | 2017 | 325,545 | | 2016 | 322,510 | | 2015 | 317,827 | | 2014 | 312,484 | | 2013 | 306,833 | | 2012 | 300,879 | | 2011 | 294,742 | | 2010 | 288,757 | | 2009 | 283,207 | | 2008 | 278,135 | | 2007 | 274,226 | | 2006 | 271,828 | | 2005 | 269,095 | | 2004 | 266,378 | | 2003 | 263,897 | | 2002 | 261,267 | | 2001 | 258,586 | | 2000 | 256,390 | | 1999 | 254,594 | | 1998 | 253,016 | | 1997 | 251,601 | | 1996 | 245,022 | | 1995 | 237,622 | | 1994 | 229,417 | | 1993 | 220,523 | | 1992 | 211,204 | | 1991 | 201,853 | | 1990 | 192,784 |
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