Year	Number of Firms
1997-01-01	4
2002-01-01	8
2003-01-01	13
2004-01-01	18
2005-01-01	12
2006-01-01	17
2007-01-01	26
2008-01-01	37
2009-01-01	28
2010-01-01	31
2011-01-01	27
2012-01-01	22
2013-01-01	31
2014-01-01	34
2015-01-01	38
2016-01-01	34