_[DeadConfederates.com][1]_ suggests that Southern ports paid 75% of tariffs. Late to the game but interesting none the less.  The [Third Annual Report of the Chamber of Commerce of the State of New York][2] may contain additional relevant information.


  [1]: https://deadconfederates.com/tag/southern-ports-paid-75-percent-of-tariffs-in-1859/
  [2]: http://books.google.com/books?id=NKcoAAAAYAAJ&printsec=frontcover&source=gbs_ge_summary_r&cad=0#v=onepage&q&f=false