Year	Number of Firms
1997-01-01	3
2002-01-01	8
2003-01-01	5
2004-01-01	10
2005-01-01	5
2006-01-01	13
2007-01-01	13
2008-01-01	15
2009-01-01	11
2010-01-01	14
2011-01-01	17
2012-01-01	23
2013-01-01	15
2014-01-01	16
2015-01-01	10
2016-01-01	18