Year Number of Firms 1992-01-01 1 1997-01-01 2 2002-01-01 4 2003-01-01 5 2004-01-01 5 2005-01-01 15 2006-01-01 17 2007-01-01 20 2008-01-01 16 2009-01-01 28 2010-01-01 25 2011-01-01 36 2012-01-01 27 2013-01-01 21 2014-01-01 11 2015-01-01 16 2016-01-01 11