Year	Number of Firms
1992-01-01	120
1997-01-01	148
2002-01-01	133
2003-01-01	156
2004-01-01	151
2005-01-01	166
2006-01-01	152
2007-01-01	168
2008-01-01	180
2009-01-01	163
2010-01-01	174
2011-01-01	177
2012-01-01	184
2013-01-01	143
2014-01-01	159
2015-01-01	156
2016-01-01	151