Year	Number of Firms
1992-01-01	50
1997-01-01	58
2002-01-01	45
2003-01-01	65
2004-01-01	62
2005-01-01	58
2006-01-01	65
2007-01-01	67
2008-01-01	70
2009-01-01	78
2010-01-01	89
2011-01-01	38