Year	Number of Firms
1997-01-01	17
2002-01-01	25
2003-01-01	13
2004-01-01	19
2005-01-01	28
2006-01-01	22
2007-01-01	35
2008-01-01	30
2009-01-01	24
2010-01-01	31
2011-01-01	39
2012-01-01	36
2013-01-01	38
2014-01-01	38
2015-01-01	38
2016-01-01	41