Someone mentioned duration of transmissions vs. number of transmissions.
February 2006
Total duration of PPAN calls - 1128 seconds
Total duration of actual emergency calls - 2706 seconds
Total duration of chat/non-operational calls - 8566 seconds
July 2006
Total duration of PPAN calls - 3488 seconds
Total duration of actual emergency calls - 3437 seconds
Total duration of chat/non-operational calls - 15068 seconds
The statistical peak of 15068 seconds was largely attributable to two particular afternoon/evening periods on 1 July and 4 July.