Year	Number of Firms
1997-01-01	9
2002-01-01	19
2003-01-01	17
2004-01-01	14
2005-01-01	23
2006-01-01	24
2007-01-01	24
2008-01-01	30
2009-01-01	23
2010-01-01	25
2011-01-01	22
2012-01-01	23
2013-01-01	26
2014-01-01	29
2015-01-01	24
2016-01-01	26