Year	Number of Firms
1997-01-01	9
2002-01-01	10
2003-01-01	13
2004-01-01	13
2005-01-01	13
2006-01-01	12
2007-01-01	14
2008-01-01	17
2009-01-01	24
2010-01-01	27
2011-01-01	35
2012-01-01	22
2013-01-01	24
2014-01-01	26
2015-01-01	24
2016-01-01	18