| Year | Value | | 2022 | 4,835,520 | | 2021 | 4,687,304 | | 2020 | 4,363,919 | | 2019 | 4,418,919 | | 2018 | 4,222,041 | | 2017 | 3,886,167 | | 2016 | 3,367,573 | | 2015 | 3,068,156 | | 2014 | 3,027,243 | | 2013 | 2,877,584 | | 2012 | 3,375,205 | | 2011 | 2,942,313 | | 2010 | 2,510,470 | | 2009 | 2,249,023 | | 2008 | 1,763,178 | | 2007 | 1,194,583 | | 2006 | 774,900 | | 2005 | 557,207 | | 2004 | 428,695 | | 2003 | 319,000 | | 2002 | 216,000 | | 2001 | 195,000 | | 2000 | 154,600 | | 1999 | 34,562 | | 1998 | 9,032 | | 1997 | 2,000 | | 1996 | 900 |
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