Year Number of Firms 1992-01-01 281 1997-01-01 432 2002-01-01 445 2003-01-01 485 2004-01-01 536 2005-01-01 547 2006-01-01 561 2007-01-01 575 2008-01-01 600 2009-01-01 592 2010-01-01 629 2011-01-01 672 2012-01-01 682 2013-01-01 683 2014-01-01 685 2015-01-01 706 2016-01-01 692