| Year | Value | | 2019 | 1,978,358 | | 2018 | 1,988,409 | | 2017 | 1,990,466 | | 2016 | 1,993,642 | | 2015 | 2,002,007 | | 2014 | 1,992,835 | | 2013 | 1,992,175 | | 2012 | 1,984,478 | | 2011 | 1,974,959 | | 2010 | 1,965,548 | | 2009 | 1,977,711 | | 2008 | 1,926,325 | | 2007 | 1,899,319 | | 2006 | 1,827,480 | | 2005 | 1,755,853 | | 2004 | 1,681,363 | | 2003 | 1,642,033 | | 2002 | 1,604,655 | | 2001 | 1,578,870 | | 2000 | 1,557,645 | | 1999 | 1,527,711 | | 1998 | 1,505,172 | | 1997 | 1,503,540 | | 1996 | 1,489,690 | | 1995 | 1,449,872 | | 1994 | 1,434,260 | | 1993 | 1,418,453 | | 1992 | 1,446,725 | | 1991 | 1,461,036 | | 1990 | 1,470,959 |
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