Year	Number of Firms
2004-01-01	3
2005-01-01	1
2006-01-01	1
2008-01-01	3
2009-01-01	7
2010-01-01	18
2011-01-01	23
2012-01-01	17
2013-01-01	25
2014-01-01	19
2015-01-01	14
2016-01-01	9