Year	Number of Firms
1997-01-01	3
2002-01-01	8
2003-01-01	9
2004-01-01	6
2005-01-01	2
2006-01-01	4
2007-01-01	7
2008-01-01	11
2009-01-01	17
2010-01-01	10
2011-01-01	18
2012-01-01	21
2013-01-01	21
2014-01-01	30
2015-01-01	24
2016-01-01	24