Year Number of Firms 1992-01-01 963 1997-01-01 1647 2002-01-01 2045 2003-01-01 2177 2004-01-01 2534 2005-01-01 3008 2006-01-01 3180 2007-01-01 3472 2008-01-01 4035 2009-01-01 4332 2010-01-01 4688 2011-01-01 5154 2012-01-01 5225 2013-01-01 5152 2014-01-01 4806 2015-01-01 4750 2016-01-01 4811