Year	Number of Firms
1992-01-01	2
1997-01-01	5
2002-01-01	9
2003-01-01	6
2004-01-01	9
2005-01-01	13
2006-01-01	10
2007-01-01	7
2008-01-01	19
2009-01-01	18
2010-01-01	21
2011-01-01	21
2012-01-01	16
2013-01-01	21
2014-01-01	28
2015-01-01	28
2016-01-01	23