Year	Number of Firms
1992-01-01	220
1997-01-01	320
2002-01-01	278
2003-01-01	281
2004-01-01	334
2005-01-01	350
2006-01-01	356
2007-01-01	364
2008-01-01	425
2009-01-01	392
2010-01-01	453
2011-01-01	486
2012-01-01	534
2013-01-01	505
2014-01-01	537
2015-01-01	512
2016-01-01	504