Year	Number of Firms
2004-01-01	1
2005-01-01	5
2006-01-01	9
2007-01-01	14
2008-01-01	22
2009-01-01	29
2010-01-01	37
2011-01-01	24
2012-01-01	37
2013-01-01	34
2014-01-01	31
2015-01-01	12
2016-01-01	8