| Year | Value | | 2021 | 32.358 | | 2020 | 593.365 | | 2019 | 1,806 | | 2018 | 14,543 | | 2017 | 13,876 | | 2016 | 11,759 | | 2015 | 10,606 | | 2014 | 9,197 | | 2013 | 8,568 | | 2012 | 11,711 | | 2011 | 9,400 | | 2010 | 8,836 | | 2009 | 5,439 | | 2008 | 5,450 | | 2007 | 6,942 | | 2006 | 6,513 | | 2005 | 6,455 | | 2004 | 6,137 | | 2003 | 6,034 | | 2002 | 5,080 | | 2001 | 5,131 | | 2000 | 5,161 | | 1999 | 5,500 | | 1998 | 7,500 | | 1997 | 7,400 | | 1996 | 7,200 | | 1995 | 6,800 | | 1994 | 6,300 | | 1993 | 6,300 | | 1992 | 9,400 | | 1991 | 8,100 |
|