Year Number of Firms 1992-01-01 8 1997-01-01 5 2002-01-01 6 2003-01-01 8 2004-01-01 4 2005-01-01 6 2006-01-01 12 2007-01-01 16 2008-01-01 13 2009-01-01 13 2010-01-01 17 2011-01-01 11 2012-01-01 19 2013-01-01 16 2014-01-01 16 2015-01-01 19 2016-01-01 16