Year	Number of Firms
1992-01-01	305
1997-01-01	488
2002-01-01	486
2003-01-01	527
2004-01-01	522
2005-01-01	521
2006-01-01	473
2007-01-01	489
2008-01-01	500
2009-01-01	483
2010-01-01	504
2011-01-01	544
2012-01-01	545
2013-01-01	534
2014-01-01	546
2015-01-01	515
2016-01-01	523