Year	Number of Firms
1992-01-01	170
1997-01-01	156
2002-01-01	277
2003-01-01	310
2004-01-01	298
2005-01-01	303
2006-01-01	342
2007-01-01	398
2008-01-01	410
2009-01-01	474
2010-01-01	473
2011-01-01	477
2012-01-01	453
2013-01-01	384
2014-01-01	412
2015-01-01	418
2016-01-01	469