Year	Number of Firms
1992-01-01	1
2002-01-01	2
2003-01-01	2
2004-01-01	1
2005-01-01	2
2006-01-01	1
2009-01-01	1
2010-01-01	1
2011-01-01	5
2013-01-01	1
2014-01-01	2