Year	Number of Firms
1992-01-01	308
1997-01-01	393
2002-01-01	463
2003-01-01	487
2004-01-01	465
2005-01-01	509
2006-01-01	514
2007-01-01	551
2008-01-01	574
2009-01-01	472
2010-01-01	490
2011-01-01	524
2012-01-01	477
2013-01-01	459
2014-01-01	466
2015-01-01	444
2016-01-01	447