Aug 15, 2011 QFR - http://wol.jw.org/en/wol/d/r1/lp-e/2011609?q=peak+publishers&p=par
Peak publishers and average publishers. “Publishers” includes baptized Witnesses of Jehovah as well as unbaptized ones who qualify to be Kingdom preachers. “Peak publishers” is the highest number reporting for any one month of the service year and may include late reports that were not added to the preceding month’s report. In this way some publishers may be counted twice. However, the peak figure does not include the number of publishers who actually shared in the ministry but forgot to report. This emphasizes the importance of each publisher reporting promptly each month. “Average publishers” is the typical number of different ones reporting time in the ministry each month.