Year	Number of Firms
1992-01-01	2
1997-01-01	5
2002-01-01	15
2003-01-01	15
2004-01-01	12
2005-01-01	13
2006-01-01	24
2007-01-01	19
2008-01-01	33
2009-01-01	35
2010-01-01	28
2011-01-01	35
2012-01-01	36
2013-01-01	31
2014-01-01	15
2015-01-01	20
2016-01-01	22