Year Number of Firms 1992-01-01 16 1997-01-01 17 2002-01-01 29 2003-01-01 24 2004-01-01 22 2005-01-01 23 2006-01-01 28 2007-01-01 31 2008-01-01 30 2009-01-01 35 2010-01-01 42 2011-01-01 37 2012-01-01 35 2013-01-01 38 2014-01-01 26 2015-01-01 28 2016-01-01 25