Year	Number of Firms
1992-01-01	140
1997-01-01	211
2002-01-01	271
2003-01-01	276
2004-01-01	281
2005-01-01	277
2006-01-01	332
2007-01-01	354
2008-01-01	398
2009-01-01	371
2010-01-01	410
2011-01-01	439
2012-01-01	458
2013-01-01	453
2014-01-01	469
2015-01-01	496
2016-01-01	505