Year	Number of Firms
1997-01-01	107
2002-01-01	120
2003-01-01	158
2004-01-01	176
2005-01-01	176
2006-01-01	210
2007-01-01	242
2008-01-01	274
2009-01-01	250
2010-01-01	284
2011-01-01	259
2012-01-01	223
2013-01-01	253
2014-01-01	241
2015-01-01	244
2016-01-01	277