Year	Number of Firms
1997-01-01	6
2002-01-01	11
2003-01-01	21
2004-01-01	19
2005-01-01	15
2006-01-01	26
2007-01-01	22
2008-01-01	25
2009-01-01	29
2010-01-01	32
2011-01-01	24
2012-01-01	26
2013-01-01	24
2014-01-01	23
2015-01-01	29
2016-01-01	25