Year	Number of Firms
1997-01-01	7
2002-01-01	25
2003-01-01	23
2004-01-01	28
2005-01-01	26
2006-01-01	31
2007-01-01	31
2008-01-01	43
2009-01-01	40
2010-01-01	47
2011-01-01	47
2012-01-01	45
2013-01-01	48
2014-01-01	55
2015-01-01	49
2016-01-01	59