Year	Number of Firms
1992-01-01	395
1997-01-01	557
2002-01-01	498
2003-01-01	508
2004-01-01	502
2005-01-01	470
2006-01-01	462
2007-01-01	474
2008-01-01	493
2009-01-01	456
2010-01-01	460
2011-01-01	462
2012-01-01	496
2013-01-01	462
2014-01-01	458
2015-01-01	448
2016-01-01	453