Year	Number of Firms
1997-01-01	5
2002-01-01	12
2003-01-01	18
2004-01-01	16
2005-01-01	21
2006-01-01	15
2007-01-01	13
2008-01-01	14
2009-01-01	17
2010-01-01	20
2011-01-01	35
2012-01-01	29
2013-01-01	42
2014-01-01	34
2015-01-01	49
2016-01-01	57