How Much Sleep Do New Parents Lose?

An often-cited statistic claims a new baby typically robs parents of anywhere between 400-750 hours of sleep in the first year alone.

Related Question: Over to you, moms and dads—how much sleep did you miss out on in your child's first year?

[A reliable primary source was hard to pin down, which is why I'm curious to see how your experience matches up. See previous Numbers of the Day here. ]