Year	Number of Firms
1992-01-01	19
1997-01-01	24
2002-01-01	21
2003-01-01	20
2004-01-01	24
2005-01-01	33
2006-01-01	24
2007-01-01	31
2008-01-01	42
2009-01-01	47
2010-01-01	31
2011-01-01	47
2012-01-01	30
2013-01-01	35
2014-01-01	32
2015-01-01	33
2016-01-01	44