Year	Number of Firms
1992-01-01	250
1997-01-01	380
2002-01-01	397
2003-01-01	410
2004-01-01	373
2005-01-01	417
2006-01-01	387
2007-01-01	401
2008-01-01	467
2009-01-01	464
2010-01-01	467
2011-01-01	486
2012-01-01	505
2013-01-01	494
2014-01-01	480
2015-01-01	452
2016-01-01	504