Year	Number of Firms
1992-01-01	306
1997-01-01	419
2002-01-01	393
2003-01-01	452
2004-01-01	492
2005-01-01	540
2006-01-01	512
2007-01-01	537
2008-01-01	543
2009-01-01	483
2010-01-01	537
2011-01-01	584
2012-01-01	540
2013-01-01	587
2014-01-01	588
2015-01-01	539
2016-01-01	549