Assuming that the E-space stories are the January release, and that The War Games is sometime in 2009 (as it was said ages back that there were plans to put it out on its 40th anniversary), the figures on stories left for each Doctor are...
Hartnell: 9 (+ two part complete stories).
Troughton: 2 (+ one part complete story).
Pertwee: 15
Tom Baker: 14 (+ Shada)
Davison: 9
Colin Baker: 2
McCoy: 7
Wow. I guess things aren't quite so dire for this McCoy fan as he thought. But why so many Pertwee's left unreleased (particularly compared to the controversial at best Colin Baker)?
There seem to be two reasons for the relative lack of Pertwee releases:
One is that more than half of his era is six parters, and in the early days, when all releases were single disc, there was a reluctance to try and cram 6 episodes and some extras onto a single disc;
The other is that an awful lot of the Pertwee stories need extensive restoration work before release, but are restorable, and might get more so as restoration tech improves (whereas some of the Troughton and Hartnell prints are grotty, but are never going to get any better, so no harm in releasing them now).
Also, for budget (and time) reasons, there has to be a balance of relatively 'easy' releases, where the source material is already in a pretty good state (like the Colin Baker era), and more complex ones that need a lot of work. I think I'm right in saying that of the unreleased Pertwees, only three of them exist as their original 625-line PAL recordings (Day of the Daleks, Monster of Peladon* and Planet of the Spiders) - whereas five of the nine Pertwees released so far exist in their original form.
Another six are a mix of PAL and NTSC tapes (needing reverse standards conversion before release). And the others are either black and white (in whole or part), or only exist in colour as the 're-colourised' versions (like Silurians), which the Restoration Team would like to redo before release (they were originally reconstructed 15 years ago, and technology's moved on a lot since then).
* And Monster of Peladon's probably on the back burner, as the logical thing would be to put the Peladon stories out as a box set, but as someone posted on here recently, the tapes for The Curse of Peladon are in such a dreadful state that it needs more work than any other story around, and will probably be one of the last stories released.
Edit: Thinking about it, I think there's now a complete PAL copy of Death to the Daleks back in the archives as well - in any case, the existing copy of episode one was only missing two brief sequences which were cut from the Australian PAL copy, and exist on NTSC.