Year	Number of Firms
1997-01-01	3
2002-01-01	11
2003-01-01	35
2004-01-01	128
2005-01-01	129
2006-01-01	225
2007-01-01	174
2008-01-01	227
2009-01-01	273
2010-01-01	301
2011-01-01	361
2012-01-01	426
2013-01-01	442
2014-01-01	487
2015-01-01	414
2016-01-01	327