Year	Number of Firms
1992-01-01	189
1997-01-01	342
2002-01-01	357
2003-01-01	401
2004-01-01	421
2005-01-01	473
2006-01-01	463
2007-01-01	502
2008-01-01	500
2009-01-01	479
2010-01-01	526
2011-01-01	543
2012-01-01	522
2013-01-01	503
2014-01-01	500
2015-01-01	469
2016-01-01	453