Year Number of Firms 1992-01-01 318 1997-01-01 456 2002-01-01 464 2003-01-01 486 2004-01-01 512 2005-01-01 536 2006-01-01 565 2007-01-01 608 2008-01-01 658 2009-01-01 601 2010-01-01 651 2011-01-01 705 2012-01-01 726 2013-01-01 655 2014-01-01 668 2015-01-01 597 2016-01-01 574