How Can I Find Site's Past Rankings?

[skyward]

Hi,

My site dropped down to about #8 in rank, but it was up around 2 or 3 a month or so ago.

I'd like to view the number of hits the site received when it ranked it various positions.

Does anyone know how to do this? With Google Analytics I found that I can view the number of hits on specific dates, but it doesn't indicate the rank for a specific time.

Thanks.