The following charts show the number of pwsync accounts on various clusters at various times.
The blips on the "UW Email" line in the above chart are due to history
of the Deskmail accounts and the granularity of my data. Prior to
November 2001, the Deskmail subscriptions were separated into Mailer,
BP and EP accounts. This all got combined (and then separated and then
recombined, apparently) into a single "Deskmail" account.