Year	Number of Firms
1997-01-01	8
2002-01-01	18
2003-01-01	20
2004-01-01	16
2005-01-01	22
2006-01-01	32
2007-01-01	36
2008-01-01	49
2009-01-01	36
2010-01-01	35
2011-01-01	49
2012-01-01	55
2013-01-01	51
2014-01-01	52
2015-01-01	43
2016-01-01	51