Year	Number of Firms
1997-01-01	2
2002-01-01	1
2003-01-01	4
2004-01-01	10
2005-01-01	5
2006-01-01	6
2007-01-01	11
2008-01-01	10
2009-01-01	17
2010-01-01	20
2011-01-01	24
2012-01-01	22
2013-01-01	15
2014-01-01	12
2015-01-01	10
2016-01-01	12