Year	Number of Firms
1997-01-01	4
2002-01-01	4
2003-01-01	6
2004-01-01	8
2005-01-01	11
2006-01-01	10
2007-01-01	11
2008-01-01	14
2009-01-01	9
2010-01-01	17
2011-01-01	23
2012-01-01	23
2013-01-01	25
2014-01-01	27
2015-01-01	30
2016-01-01	22