Year Number of Firms 1992-01-01 5 1997-01-01 7 2002-01-01 18 2003-01-01 19 2004-01-01 11 2005-01-01 14 2006-01-01 26 2007-01-01 62 2008-01-01 98 2009-01-01 181 2010-01-01 281 2011-01-01 290 2012-01-01 285 2013-01-01 305 2014-01-01 339 2015-01-01 356 2016-01-01 229