Year	Number of Firms
1992-01-01	860
1997-01-01	978
2002-01-01	1252
2003-01-01	1344
2004-01-01	1344
2005-01-01	1637
2006-01-01	2097
2007-01-01	2250
2008-01-01	2786
2009-01-01	3089
2010-01-01	3346
2011-01-01	1772