That's ridiculous, that the industrialized, wealthy North imported only a tenth as much as the agrarian, poor South. You'll have to do better than MSN. How about a reputable source?
Bear in mind that over 90% of tariffs in 1860 were collected in just three ports -- New York, Philadelphia, and Boston -- so it looks like MSN got its numbers reversed.
"How about a reputable source?"
Would you consider the US Treasury Department a reputable source?