Year	Number of Firms
1992-01-01	372
1997-01-01	462
2002-01-01	486
2003-01-01	461
2004-01-01	482
2005-01-01	511
2006-01-01	509
2007-01-01	589
2008-01-01	638
2009-01-01	515
2010-01-01	541
2011-01-01	584
2012-01-01	541
2013-01-01	533
2014-01-01	545
2015-01-01	530
2016-01-01	490