Year	Number of Firms
1992-01-01	452
1997-01-01	511
2002-01-01	511
2003-01-01	508
2004-01-01	579
2005-01-01	573
2006-01-01	535
2007-01-01	523
2008-01-01	561
2009-01-01	510
2010-01-01	534
2011-01-01	554
2012-01-01	511
2013-01-01	462
2014-01-01	450
2015-01-01	449
2016-01-01	471