Year Number of Firms 1992-01-01 55 1997-01-01 145 2002-01-01 268 2003-01-01 355 2004-01-01 376 2005-01-01 435 2006-01-01 531 2007-01-01 537 2008-01-01 563 2009-01-01 541 2010-01-01 585 2011-01-01 636 2012-01-01 648 2013-01-01 669 2014-01-01 682 2015-01-01 689 2016-01-01 668