It's been a while since I fiddled with the CDC Wonder pages - I forgot how interesting that service is.
Here's what came up for Oregon twin death (from under one hour-27 days) in hospital births:
|Census Region 4: West||22||1,428||15.41|
It wouldn't bring up homebirths due to the "suppression contraints"
Here is the whole of the US for 2008 for hospital births:
|Census Region 1: Northeast||528||25,895||20.39|
|Census Region 2: Midwest||678||29,798||22.75|
|Census Region 3: South||1,226||51,085||24.00|
|Census Region 4: West||529||31,505||16.79|
Still even with the whole US selected it still won't give stats on out of hospital birth.