Year Number of Firms 1992-01-01 7 1997-01-01 8 2002-01-01 12 2003-01-01 12 2004-01-01 20 2005-01-01 22 2006-01-01 21 2007-01-01 20 2008-01-01 26 2009-01-01 23 2010-01-01 23 2011-01-01 28 2012-01-01 27 2013-01-01 29 2014-01-01 31 2015-01-01 38 2016-01-01 25