A lot? Heck, nearly all.

But then that's what Daggerfall did as well (and a lot of other old school cRPGs). That's how you have thousands of "unique" NPCs. Then you have Oblivion which tried to make the NPCs more unique with voice acting...but all that lead to was strained resources and limited dialogue. Sure the NPC has its own personality, but what good is it if it's limited to a single sentence?

I'm not surprised if Bethesda is really ditching the "unique" NPCs for the generic unimportant NPCs with no real dialogue (a la Fallout). That's one area of the series I'm happy to see changed. Just listen to Max von Sydow's dialogue in the Sounds of Skyrim video. Ten thousand times better than the dialogue in Oblivion. Fewer unique NPCs means focused resources and more time spent improving their personalities and higher quality writing/voice recording all around.