Average on SDN is AA 22 TS 22 BIO 22 GCHEM 23 OCHEM 23 RC 21 QR 20 PAT 22.
Out of about 300 samples, 155 people have 22+ AA/TS scores on SDN between june 2015 - june 2016.
300/13,000 is about 1 % of all test takers however, so using SDN scores is not a good idea.