Year	Number of Firms
1997-01-01	19
2002-01-01	44
2003-01-01	51
2004-01-01	69
2005-01-01	85
2006-01-01	64
2007-01-01	96
2008-01-01	121
2009-01-01	107
2010-01-01	142
2011-01-01	155
2012-01-01	150
2013-01-01	152
2014-01-01	176
2015-01-01	200
2016-01-01	224