Year	Number of Firms
1992-01-01	171
1997-01-01	180
2002-01-01	164
2003-01-01	163
2004-01-01	210
2005-01-01	200
2006-01-01	225
2007-01-01	262
2008-01-01	301
2009-01-01	241
2010-01-01	258
2011-01-01	258
2012-01-01	242
2013-01-01	249
2014-01-01	250
2015-01-01	245
2016-01-01	249