Cisco provided this detail earlier on
but now it has been directed to this link http://www.cisco.com/web/learning/le3/ccie/index.html
This url includes details on CCIE exams, labs and preprations, but does not mention any detail regarding certificate counts.
You can refer to http://www.bradreese.com/blog/ccie-6-2-2010.htm for details you are looking for.
I'm not sure of the accuracy or relevancy of the information on this link when compared that with cisco. But then you can have some idea.