Year	Number of Firms
1992-01-01	28
1997-01-01	53
2002-01-01	14
2003-01-01	20
2004-01-01	28
2005-01-01	23
2006-01-01	31
2007-01-01	31
2008-01-01	40
2009-01-01	40
2010-01-01	30
2011-01-01	32
2012-01-01	29
2013-01-01	23
2014-01-01	29
2015-01-01	30
2016-01-01	37