Year	Number of Firms
1997-01-01	7
2002-01-01	12
2003-01-01	16
2004-01-01	14
2005-01-01	21
2006-01-01	18
2007-01-01	22
2008-01-01	47
2009-01-01	32
2010-01-01	37
2011-01-01	41
2012-01-01	40
2013-01-01	45
2014-01-01	49
2015-01-01	35
2016-01-01	28