OT(?) - Historical journal value data?

From: Nate Vack <njvack_at_nyob> Date: Thu, 21 May 2009 08:38:46 -0500 To: CODE4LIB_at_LISTSERV.ND.EDU

OK, here's one for y'all,

Anyone know of a source of historical journal value data? I've seen
the "OMG Article Costs Will Bury Libraries" graph a million times, but
I've only ever seen spotty data points for cost/article or
cost/character.

Anyone know if that data exists, and where it might be found?

Thanks,
-Nate