Year	Number of Firms
1997-01-01	22
2002-01-01	48
2003-01-01	60
2004-01-01	58
2005-01-01	64
2006-01-01	75
2007-01-01	106
2008-01-01	104
2009-01-01	135
2010-01-01	137
2011-01-01	136
2012-01-01	137
2013-01-01	129
2014-01-01	123
2015-01-01	138
2016-01-01	146