Year	Number of Firms
1997-01-01	9
2002-01-01	8
2003-01-01	15
2004-01-01	20
2005-01-01	21
2006-01-01	21
2007-01-01	24
2008-01-01	31
2009-01-01	21
2010-01-01	18
2011-01-01	25
2012-01-01	22
2013-01-01	26
2014-01-01	28
2015-01-01	29
2016-01-01	24