Year	Number of Firms
1992-01-01	17
1997-01-01	13
2002-01-01	17
2003-01-01	13
2004-01-01	8
2005-01-01	15
2006-01-01	13
2007-01-01	12
2008-01-01	17
2009-01-01	18
2010-01-01	18
2011-01-01	20
2012-01-01	17
2013-01-01	19
2014-01-01	13
2015-01-01	16
2016-01-01	17