Year	Number of Firms
1997-01-01	3
2002-01-01	3
2003-01-01	8
2004-01-01	11
2005-01-01	9
2006-01-01	19
2007-01-01	14
2008-01-01	15
2009-01-01	14
2010-01-01	7
2011-01-01	16
2012-01-01	14
2013-01-01	21
2014-01-01	19
2015-01-01	18
2016-01-01	21