Without unnecessary doom and gloom just for doom's sake, realistically I see recalls starting around fall of 2021. At a rate of 100 per month, give or take..that's roughly 16 months for all furloughs to be recalled from the moment recalls begin. So about a year on furlough for guys at the top of the 1600. About 2.5 years for guys at the bottom.
Assuming we don't get any kind of stimulus, which is looking very likely at any time.