Postgres mail list traffic over time - Mailing list pgsql-general

I got interested by Bruce's plot of PG email traffic here
http://momjian.us/main/img/pgincoming.gif
and decided to try to extend it into the past.  The data I have
available is just my own incoming mail log, but being a pack-rat by
nature I have that back to April 1998.  Attached is a graph of Postgres
list messages per month since then.  I should note that this covers only
the mail lists I'm subscribed to, which has been most of them since
about 1999; but the first few numbers in this chart are undercounts by
comparison.  Also, the very last dot is month-to-date for November and
so is an underestimate.

So, to a first approximation, the PG list traffic has been constant
since 2000.  Not the result I expected.

            regards, tom lane