Year Number of Firms 1992-01-01 25 1997-01-01 32 2002-01-01 51 2003-01-01 46 2004-01-01 46 2005-01-01 67 2006-01-01 57 2007-01-01 71 2008-01-01 78 2009-01-01 75 2010-01-01 76 2011-01-01 77 2012-01-01 67 2013-01-01 64 2014-01-01 69 2015-01-01 56 2016-01-01 52