Year	Number of Firms
1992-01-01	4
1997-01-01	17
2002-01-01	7
2003-01-01	9
2004-01-01	9
2005-01-01	7
2006-01-01	11
2007-01-01	9
2008-01-01	9
2009-01-01	13
2010-01-01	11
2011-01-01	15
2012-01-01	13
2013-01-01	16
2014-01-01	18
2015-01-01	17
2016-01-01	17