Year Number of Firms 1992-01-01 1 1997-01-01 9 2002-01-01 11 2003-01-01 12 2004-01-01 10 2005-01-01 9 2006-01-01 10 2007-01-01 12 2008-01-01 16 2009-01-01 18 2010-01-01 30 2011-01-01 24 2012-01-01 24 2013-01-01 28 2014-01-01 27 2015-01-01 25 2016-01-01 18