Year Number of Firms 1992-01-01 326 1997-01-01 511 2002-01-01 579 2003-01-01 595 2004-01-01 591 2005-01-01 596 2006-01-01 636 2007-01-01 703 2008-01-01 797 2009-01-01 827 2010-01-01 826 2011-01-01 959 2012-01-01 1010 2013-01-01 981 2014-01-01 929 2015-01-01 861 2016-01-01 784