Year	Number of Firms
1992-01-01	2
2002-01-01	2
2003-01-01	2
2005-01-01	2
2006-01-01	2
2007-01-01	2
2009-01-01	2
2010-01-01	3
2011-01-01	2
2012-01-01	2
2013-01-01	6
2014-01-01	11
2015-01-01	7
2016-01-01	15