Year	Number of Firms
1997-01-01	2
2002-01-01	4
2003-01-01	18
2004-01-01	49
2005-01-01	37
2006-01-01	39
2007-01-01	59
2008-01-01	65
2009-01-01	98
2010-01-01	146
2011-01-01	144
2012-01-01	149
2013-01-01	111
2014-01-01	102
2015-01-01	72
2016-01-01	74