Year	Number of Firms
1992-01-01	8
1997-01-01	16
2002-01-01	11
2003-01-01	18
2004-01-01	31
2005-01-01	43
2006-01-01	31
2007-01-01	31
2008-01-01	28
2009-01-01	15
2010-01-01	15
2011-01-01	9
2012-01-01	11
2013-01-01	19
2014-01-01	20
2015-01-01	18
2016-01-01	21