Try this link...
http://www.cdc.gov/nchs/fastats/unmarry.htm
Over 18% of the families in South Dakota do not have fathers present in the home.
Over 27% of the babies born in South Dakota are born out of wedlock - third highest in the nation.
Over 76% of teen births in South Dakota are out of wedlock.
http://bayh.senate.gov/issues_fatherhood_trends2.html
The dirty little secret is that in the Midwest, as in most other areas of the USA, marriage is not the norm in the coming generation.