| Year | Value | | 2021 | 11,289 | | 2020 | 35,027 | | 2019 | 40,944 | | 2018 | 26,031 | | 2017 | 1,069,268 | | 2016 | 1,046,012 | | 2015 | 1,363,946 | | 2014 | 1,274,911 | | 2013 | 1,009,728 | | 2012 | 592,996 | | 2011 | 69,445 | | 2010 | 81,450 | | 2009 | 616,514 | | 2008 | 609,847 | | 2007 | 423,585 | | 2006 | 429,657 | | 2005 | 505,409 | | 2004 | 447,883 | | 2003 | 329,271 | | 2002 | 303,865 | | 2001 | 304,051 | | 2000 | 283,836 | | 1999 | 249,600 | | 1998 | 258,900 | | 1997 | 236,800 | | 1996 | 214,000 | | 1995 | 209,900 | | 1994 | 194,500 | | 1993 | 149,700 | | 1992 | 557,200 |
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