Year Number of Firms 1992-01-01 204 1997-01-01 302 2002-01-01 400 2003-01-01 380 2004-01-01 440 2005-01-01 415 2006-01-01 447 2007-01-01 480 2008-01-01 540 2009-01-01 529 2010-01-01 542 2011-01-01 666 2012-01-01 596 2013-01-01 563 2014-01-01 590 2015-01-01 572 2016-01-01 594