Year Number of Firms 1992-01-01 260 1997-01-01 418 2002-01-01 483 2003-01-01 476 2004-01-01 512 2005-01-01 517 2006-01-01 548 2007-01-01 578 2008-01-01 616 2009-01-01 660 2010-01-01 677 2011-01-01 694 2012-01-01 676 2013-01-01 688 2014-01-01 723 2015-01-01 679 2016-01-01 640