Year	Number of Firms
1992-01-01	6
1997-01-01	81
2002-01-01	130
2003-01-01	164
2004-01-01	192
2005-01-01	220
2006-01-01	229
2007-01-01	287
2008-01-01	403
2009-01-01	293
2010-01-01	370
2011-01-01	471
2012-01-01	477
2013-01-01	506
2014-01-01	581
2015-01-01	455
2016-01-01	479