Year	Number of Firms
1997-01-01	10
2002-01-01	18
2003-01-01	20
2004-01-01	34
2005-01-01	41
2006-01-01	46
2007-01-01	45
2008-01-01	52
2009-01-01	46
2010-01-01	35
2011-01-01	38
2012-01-01	48
2013-01-01	47
2014-01-01	34
2015-01-01	34
2016-01-01	46