Year	Number of Firms
1997-01-01	3
2002-01-01	3
2003-01-01	10
2004-01-01	8
2005-01-01	8
2006-01-01	17
2007-01-01	12
2008-01-01	14
2009-01-01	18
2010-01-01	26
2011-01-01	37
2012-01-01	31
2013-01-01	30
2014-01-01	25
2015-01-01	29
2016-01-01	36