Year	Number of Firms
1997-01-01	11
2002-01-01	8
2003-01-01	23
2004-01-01	22
2005-01-01	24
2006-01-01	22
2007-01-01	28
2008-01-01	26
2009-01-01	30
2010-01-01	25
2011-01-01	20
2012-01-01	23
2013-01-01	24
2014-01-01	22
2015-01-01	36
2016-01-01	33