Year	Number of Firms
1997-01-01	193
2002-01-01	259
2003-01-01	292
2004-01-01	326
2005-01-01	373
2006-01-01	404
2007-01-01	449
2008-01-01	507
2009-01-01	437
2010-01-01	478
2011-01-01	481
2012-01-01	489
2013-01-01	478
2014-01-01	492
2015-01-01	469
2016-01-01	475