Year Number of Firms 1992-01-01 12 1997-01-01 36 2002-01-01 35 2003-01-01 33 2004-01-01 42 2005-01-01 46 2006-01-01 52 2007-01-01 50 2008-01-01 56 2009-01-01 70 2010-01-01 77 2011-01-01 81 2012-01-01 64 2013-01-01 77 2014-01-01 73 2015-01-01 76 2016-01-01 73