Year Number of Firms 1992-01-01 162 1997-01-01 328 2002-01-01 454 2003-01-01 535 2004-01-01 536 2005-01-01 595 2006-01-01 638 2007-01-01 680 2008-01-01 733 2009-01-01 705 2010-01-01 875 2011-01-01 975 2012-01-01 960 2013-01-01 946 2014-01-01 999 2015-01-01 1004 2016-01-01 988