Year Number of Firms 1992-01-01 10 1997-01-01 8 2002-01-01 11 2003-01-01 14 2004-01-01 13 2005-01-01 11 2006-01-01 17 2007-01-01 20 2008-01-01 14 2009-01-01 20 2010-01-01 20 2011-01-01 16 2012-01-01 19 2013-01-01 19 2014-01-01 23 2015-01-01 23 2016-01-01 17