The counts are based on header lines with the following labels:
It's possible some newsreaders use other header lines to identify
themselves. The ones I've listed are the ones I've been
able to learn of. If anyone knows of a different header line
that's used to identify his or her newsreader, I would appreciate being
told about it.
Multiple newsreaders used by a poster
If a poster used more than one newsreader during the year, the script
counts only the first one. The poster's name is ignored for the rest of
the year after the first time it is found.