Year	Number of Firms
1997-01-01	2
2002-01-01	3
2003-01-01	3
2004-01-01	6
2005-01-01	11
2006-01-01	15
2007-01-01	14
2008-01-01	17
2009-01-01	28
2010-01-01	33
2011-01-01	35
2012-01-01	34
2013-01-01	27
2014-01-01	19
2015-01-01	11
2016-01-01	17