Year Number of Firms 1992-01-01 1 1997-01-01 2 2002-01-01 9 2003-01-01 9 2004-01-01 19 2005-01-01 15 2006-01-01 17 2007-01-01 14 2008-01-01 21 2009-01-01 25 2010-01-01 34 2011-01-01 60 2012-01-01 98 2013-01-01 66 2014-01-01 48 2015-01-01 43 2016-01-01 35