Year	Number of Firms
1992-01-01	172
1997-01-01	343
2002-01-01	292
2003-01-01	278
2004-01-01	299
2005-01-01	323
2006-01-01	329
2007-01-01	371
2008-01-01	415
2009-01-01	411
2010-01-01	425
2011-01-01	463
2012-01-01	484
2013-01-01	503
2014-01-01	480
2015-01-01	448
2016-01-01	454