| Year | Value | | 2023 | 2,036,257 | | 2022 | 1,980,715 | | 2021 | 1,943,633 | | 2020 | 1,843,814 | | 2019 | 1,805,610 | | 2018 | 1,727,786 | | 2017 | 1,610,005 | | 2016 | 1,706,905 | | 2015 | 1,457,522 | | 2014 | 1,411,378 | | 2013 | 1,367,894 | | 2012 | 1,326,636 | | 2011 | 1,287,035 | | 2010 | 1,248,959 | | 2009 | 1,212,309 | | 2008 | 1,176,863 | | 2007 | 1,142,442 | | 2006 | 1,109,100 | | 2005 | 1,077,573 | | 2004 | 1,046,092 | | 2003 | 1,015,318 | | 2002 | 985,125 | | 2001 | 955,641 | | 2000 | 926,965 | | 1999 | 898,440 | | 1998 | 870,673 | | 1997 | 843,602 | | 1996 | 817,324 | | 1995 | 791,721 | | 1994 | 764,956 | | 1993 | 738,759 | | 1992 | 713,255 | | 1991 | 688,581 |
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