Year	Number of Firms
1992-01-01	336
1997-01-01	522
2002-01-01	535
2003-01-01	492
2004-01-01	488
2005-01-01	503
2006-01-01	497
2007-01-01	562
2008-01-01	550
2009-01-01	498
2010-01-01	471
2011-01-01	500
2012-01-01	523
2013-01-01	511
2014-01-01	508
2015-01-01	501
2016-01-01	513