Year	Number of Firms
1992-01-01	3
1997-01-01	10
2002-01-01	16
2003-01-01	10
2004-01-01	15
2005-01-01	15
2006-01-01	15
2007-01-01	15
2008-01-01	13
2009-01-01	12
2010-01-01	17
2011-01-01	13
2012-01-01	9
2013-01-01	19
2014-01-01	16
2015-01-01	13
2016-01-01	16