58 is easy. Last few years (55, 20, 26, 39, 52).
If the B1G was worth anything right now we'd be sitting in the 20-30's. Still some time for it to all play out, but looking ahead I'd expect we'd end up with a rank around 55th again. Pretty week considering how many Power5 teams there are.
I'm assuming those are year-end numbers for the previous years. Other than MSU, our schedule is pretty back-loaded. It's still relatively easy but I'd guess it will end up 4th out of those six years - kind of in the middle.