Year Number of Firms 1992-01-01 8 1997-01-01 9 2002-01-01 7 2003-01-01 3 2004-01-01 4 2005-01-01 8 2006-01-01 3 2007-01-01 8 2008-01-01 8 2009-01-01 10 2010-01-01 13 2011-01-01 6 2012-01-01 10 2013-01-01 10 2014-01-01 15 2015-01-01 7 2016-01-01 6