Year	Number of Firms
1992-01-01	218
1997-01-01	384
2002-01-01	453
2003-01-01	497
2004-01-01	492
2005-01-01	485
2006-01-01	453
2007-01-01	515
2008-01-01	524
2009-01-01	487
2010-01-01	496
2011-01-01	485
2012-01-01	448
2013-01-01	481
2014-01-01	467
2015-01-01	451
2016-01-01	410