Year	Number of Firms
1992-01-01	171
1997-01-01	254
2002-01-01	313
2003-01-01	327
2004-01-01	324
2005-01-01	353
2006-01-01	344
2007-01-01	382
2008-01-01	428
2009-01-01	425
2010-01-01	464
2011-01-01	461
2012-01-01	485
2013-01-01	489
2014-01-01	522
2015-01-01	538
2016-01-01	538