Year	Number of Firms
1997-01-01	11
2002-01-01	18
2003-01-01	12
2004-01-01	18
2005-01-01	16
2006-01-01	18
2007-01-01	18
2008-01-01	23
2009-01-01	20
2010-01-01	23
2011-01-01	29
2012-01-01	22
2013-01-01	19
2014-01-01	29
2015-01-01	21
2016-01-01	24