Year Number of Firms 1992-01-01 233 1997-01-01 356 2002-01-01 346 2003-01-01 355 2004-01-01 415 2005-01-01 432 2006-01-01 471 2007-01-01 539 2008-01-01 606 2009-01-01 580 2010-01-01 631 2011-01-01 689 2012-01-01 666 2013-01-01 688 2014-01-01 734 2015-01-01 718 2016-01-01 638