Year Number of Firms 1992-01-01 182 1997-01-01 339 2002-01-01 426 2003-01-01 439 2004-01-01 486 2005-01-01 489 2006-01-01 472 2007-01-01 500 2008-01-01 539 2009-01-01 595 2010-01-01 567 2011-01-01 664 2012-01-01 707 2013-01-01 734 2014-01-01 772 2015-01-01 767 2016-01-01 689