Year	Number of Firms
1992-01-01	214
1997-01-01	357
2002-01-01	412
2003-01-01	418
2004-01-01	441
2005-01-01	428
2006-01-01	451
2007-01-01	487
2008-01-01	507
2009-01-01	445
2010-01-01	501
2011-01-01	483
2012-01-01	466
2013-01-01	458
2014-01-01	500
2015-01-01	452
2016-01-01	493