Year	Number of Firms
1997-01-01	12
2002-01-01	22
2003-01-01	21
2004-01-01	17
2005-01-01	17
2006-01-01	21
2007-01-01	26
2008-01-01	31
2009-01-01	28
2010-01-01	27
2011-01-01	20
2012-01-01	37
2013-01-01	28
2014-01-01	35
2015-01-01	33
2016-01-01	29