Year	Number of Firms
1992-01-01	75
1997-01-01	188
2002-01-01	220
2003-01-01	249
2004-01-01	268
2005-01-01	296
2006-01-01	340
2007-01-01	414
2008-01-01	480
2009-01-01	486
2010-01-01	543
2011-01-01	550
2012-01-01	527
2013-01-01	491
2014-01-01	517
2015-01-01	516
2016-01-01	527