Year	Number of Firms
1997-01-01	4
2002-01-01	4
2003-01-01	11
2004-01-01	5
2005-01-01	11
2006-01-01	11
2007-01-01	19
2008-01-01	19
2009-01-01	17
2010-01-01	17
2011-01-01	30
2012-01-01	47
2013-01-01	28
2014-01-01	18
2015-01-01	26
2016-01-01	23