Year	Number of Firms
1992-01-01	105
1997-01-01	220
2002-01-01	283
2003-01-01	309
2004-01-01	345
2005-01-01	364
2006-01-01	345
2007-01-01	345
2008-01-01	347
2009-01-01	352
2010-01-01	456
2011-01-01	450
2012-01-01	461
2013-01-01	489
2014-01-01	455
2015-01-01	464
2016-01-01	492