In the UK these are known as 'resuscitation' caches. I'm no expert, but although this might be technically possible, it could use quite a lot of resources to work out. It might not, but it might.
What you could do in the meantime is create a Custom Cache list using a bookmark list. Create the bookmark list on geocaching.com, with all your caches on it, then go to the settings section on your PGC profile stats, and add the bookmark list. Whilst it wouldn't show it as a simple number, it would then show them as a list.