Year Number of Firms 1992-01-01 403 1997-01-01 507 2002-01-01 600 2003-01-01 619 2004-01-01 635 2005-01-01 669 2006-01-01 691 2007-01-01 720 2008-01-01 765 2009-01-01 696 2010-01-01 683 2011-01-01 685 2012-01-01 633 2013-01-01 615 2014-01-01 639 2015-01-01 657 2016-01-01 627