Year	Number of Firms
2004-01-01	1
2005-01-01	2
2006-01-01	3
2007-01-01	13
2008-01-01	20
2009-01-01	18
2010-01-01	11
2011-01-01	2
2012-01-01	14
2013-01-01	17
2014-01-01	12
2015-01-01	7
2016-01-01	6