Year	Number of Firms
1997-01-01	4
2002-01-01	2
2003-01-01	7
2004-01-01	10
2005-01-01	11
2006-01-01	6
2007-01-01	13
2008-01-01	11
2009-01-01	12
2010-01-01	19
2011-01-01	15
2012-01-01	21
2013-01-01	23
2014-01-01	28
2015-01-01	25
2016-01-01	30