Year	Number of Firms
1992-01-01	3
1997-01-01	5
2002-01-01	13
2003-01-01	17
2004-01-01	22
2005-01-01	19
2006-01-01	21
2007-01-01	20
2008-01-01	26
2009-01-01	22
2010-01-01	22
2011-01-01	23
2012-01-01	19
2013-01-01	29
2014-01-01	27
2015-01-01	21
2016-01-01	20