Year	Number of Firms
1992-01-01	520
1997-01-01	517
2002-01-01	453
2003-01-01	460
2004-01-01	487
2005-01-01	504
2006-01-01	507
2007-01-01	620
2008-01-01	674
2009-01-01	521
2010-01-01	544
2011-01-01	546
2012-01-01	521
2013-01-01	524
2014-01-01	460
2015-01-01	493
2016-01-01	423