Year	Number of Firms
1992-01-01	86
1997-01-01	170
2002-01-01	226
2003-01-01	266
2004-01-01	299
2005-01-01	333
2006-01-01	342
2007-01-01	410
2008-01-01	425
2009-01-01	415
2010-01-01	510
2011-01-01	505
2012-01-01	498
2013-01-01	485
2014-01-01	491
2015-01-01	494
2016-01-01	508