Year Number of Firms 1992-01-01 337 1997-01-01 448 2002-01-01 502 2003-01-01 513 2004-01-01 552 2005-01-01 561 2006-01-01 564 2007-01-01 669 2008-01-01 698 2009-01-01 617 2010-01-01 658 2011-01-01 708 2012-01-01 648 2013-01-01 632 2014-01-01 702 2015-01-01 689 2016-01-01 703