Year	Number of Firms
1992-01-01	4
1997-01-01	12
2002-01-01	16
2003-01-01	17
2004-01-01	21
2005-01-01	16
2006-01-01	18
2007-01-01	24
2008-01-01	19
2009-01-01	23
2010-01-01	33
2011-01-01	36
2012-01-01	31
2013-01-01	32
2014-01-01	38
2015-01-01	33
2016-01-01	28