Year	Number of Firms
1997-01-01	5
2002-01-01	11
2003-01-01	8
2004-01-01	15
2005-01-01	18
2006-01-01	21
2007-01-01	23
2008-01-01	30
2009-01-01	29
2010-01-01	37
2011-01-01	35
2012-01-01	37
2013-01-01	36
2014-01-01	37
2015-01-01	45
2016-01-01	49