Year	Number of Firms
1992-01-01	7
1997-01-01	15
2002-01-01	13
2003-01-01	10
2004-01-01	12
2005-01-01	13
2006-01-01	12
2007-01-01	15
2008-01-01	18
2009-01-01	20
2010-01-01	22
2011-01-01	18
2012-01-01	16
2013-01-01	17
2014-01-01	21
2015-01-01	17
2016-01-01	18