Year Number of Firms 1992-01-01 581 1997-01-01 712 2002-01-01 912 2003-01-01 875 2004-01-01 873 2005-01-01 868 2006-01-01 866 2007-01-01 918 2008-01-01 933 2009-01-01 851 2010-01-01 831 2011-01-01 830 2012-01-01 851 2013-01-01 875 2014-01-01 840 2015-01-01 882 2016-01-01 859