Year	Number of Firms
1997-01-01	7
2002-01-01	3
2003-01-01	6
2004-01-01	15
2005-01-01	19
2006-01-01	18
2007-01-01	18
2008-01-01	21
2009-01-01	21
2010-01-01	21
2011-01-01	30
2012-01-01	37
2013-01-01	38
2014-01-01	34
2015-01-01	36
2016-01-01	25