Year Number of Firms 1992-01-01 345 1997-01-01 343 2002-01-01 389 2003-01-01 370 2004-01-01 421 2005-01-01 447 2006-01-01 475 2007-01-01 506 2008-01-01 559 2009-01-01 550 2010-01-01 606 2011-01-01 647 2012-01-01 647 2013-01-01 660 2014-01-01 676 2015-01-01 667 2016-01-01 583