Year Number of Firms 1992-01-01 80 1997-01-01 136 2002-01-01 173 2003-01-01 185 2004-01-01 231 2005-01-01 241 2006-01-01 282 2007-01-01 311 2008-01-01 378 2009-01-01 341 2010-01-01 359 2011-01-01 389 2012-01-01 394 2013-01-01 420 2014-01-01 447 2015-01-01 462 2016-01-01 434