Year	Number of Firms
1997-01-01	53
2002-01-01	108
2003-01-01	122
2004-01-01	159
2005-01-01	166
2006-01-01	182
2007-01-01	221
2008-01-01	253
2009-01-01	264
2010-01-01	356
2011-01-01	358
2012-01-01	356
2013-01-01	361
2014-01-01	378
2015-01-01	447
2016-01-01	433