Year Number of Firms 1992-01-01 628 1997-01-01 903 2002-01-01 659 2003-01-01 613 2004-01-01 507 2005-01-01 476 2006-01-01 550 2007-01-01 603 2008-01-01 640 2009-01-01 564 2010-01-01 598 2011-01-01 667 2012-01-01 631 2013-01-01 610 2014-01-01 655 2015-01-01 576 2016-01-01 573