Year	Number of Firms
1992-01-01	10
1997-01-01	13
2002-01-01	11
2003-01-01	10
2004-01-01	11
2005-01-01	10
2006-01-01	16
2007-01-01	12
2008-01-01	19
2009-01-01	17
2010-01-01	18
2011-01-01	14