F2A exempt from per-country limit

I read this on the visa bulletin:

"For June, F2A numbers EXEMPT from per-country limit are authorized for issuance to applicants from all countries with priority datesearlier than 01SEP14. F2A numbers SUBJECT to per-country limit are authorized for issuance to applicants chargeable to all countries EXCEPT MEXICO with priority dates beginning 01SEP14 and earlier than 08NOV14. "

so which of the 75% applications are exempt from the per-country limit?

Thanks.
 
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