That seems to vary month to month, it has gone up to 1 out of 6. We are starting another class today. If not mistaken we are down to around 900 on the recall list, and roughly 300+/- recalled.
I can see the above ratio staying that way as we get further down on the list, and furloughees decide to stay at their new respective airline. However, a large aircraft order (with 787) and/ or a new contract that sets the bar MAY push the number of furloghees wanting to return.
AAflyer