copy keyframes to different motion property

I know you can copy a clip's attributes so you can copy the keyframes from its scale or position ok, but what if you have a pile of keyframes that you did for the Position in the effects panel, and wanted to copy the same amount to a different property such as the Rotation one?

It seems strange that you can't do this, I know the result will be a different effect but I would like the same amount of keyframes I've used in one area to simply be copied to another. There must be a way.

Thanks