The instructions say
"For Fiscal Year 2014, 50,000 diversity visas
(DV) will be available.
The annual DV program makes visas available to persons meeting simple, but strict, eligibility requirements. A computergenerated, random drawing chooses selectees for DVs. The visas are distributed among six geographic regions, and
within each region, no single country may receive more than seven percent of the available DVs in any one year."
So, if we assume that is not a typo, then then limit is 7% of the 50k (3500). However, I do believe that unused NACARA allotment could be added to the 50k, but the limit would still remain at 3500. Then again - who knows if DOS are reading their instructions as carefully as we are....