Year	Number of Firms
1992-01-01	37
1997-01-01	45
2002-01-01	44
2003-01-01	39
2004-01-01	54
2005-01-01	46
2006-01-01	39
2007-01-01	52
2008-01-01	58
2009-01-01	62
2010-01-01	79
2011-01-01	39