Year	Number of Firms
2004-01-01	4
2005-01-01	12
2006-01-01	18
2007-01-01	25
2008-01-01	42
2009-01-01	53
2010-01-01	44
2011-01-01	20
2012-01-01	30
2013-01-01	48
2014-01-01	34
2015-01-01	23
2016-01-01	20