How many people with bipolar / manic-depression are staying up all night?

Bipolar: Untreated or inadequately treated, insomnia is common in manic or depressed phases.

Very common: As colleagues have noted, insomnia occurs commonly in acute manic and depressive phases. Perhaps the phrase "staying up all night" suggests the manic phase, when the sleeplessness is not experienced as distressing, but exhilarating.

Manic: When someone with unmedicated, severe bipolar I disorder is manic, literally they can be awake for days, especially if drugs or alcohol are used to extend and accentuate the mania. This is followed by a crash, with sleep lasting also for many hours.