The numbers you posted are not backed up by a source.
You just missed it then. It was at the top of the page. The "Source" is a book written in 1860, by New Yorker and economist "Thomas Prentice Kettell".
He was on your side, he was a well known and widely respected economist at the time, and it was before the Civil War had even started.
That's a pretty good source, because he has no incentive to manipulate the data to favor one side over the other.
Here are some more numbers for you. You will like these numbers even less. You also won't like the source they come from because you won't be able to criticize it.
PeaRidge to DiogenesLamp
This data chart must be the one you are seeking:
U. S. Department of Commerce
Agricultural Production of the South Yearly Detail 1859
Value of Total U.S. Exports ..........$278,902,000
Value of Raw Southern Products:
Cotton .....................$161,435,000
Tobacco .....................21,074,000
Rice .........................2,207,000
Naval stores .................3,696,000
Sugar ..........................197,000
Molasses ........................76,000
Hemp .............................9,000
Other ........................9,615,000
________ Total ( 71% ) $198,309,000
Value of Southern manufactured Cotton exports ............4,989,000
Value of cotton component of Northern Manufactured cotton exports (60%) ......3,669,000
___________ Total ( 74% ) $205,459,000
Value of Processed Foods:
.............Bread-stuffs/processed fish/meats/corn...........$36,640,000
Total Southern Products ( 87% ) $242,099,000
Export Specie for Purchase or debts: ........$57,502,000 assume 20% for overseas purchase.
Total Southern Contribution ....................$252,000,000
U.S. Department of Commerce, U. S. Treasury, Report of L. E. Chittenden, Howell Cobb, Treasurer, Annual State of the Union Address, James Buchanan, J. D. B. DeBow, Charles Adams, Thomas Kettel, W. F. Taussig, Thomas Huertas, Historical Statistics of the United States Department of Commerce, pg. 106,432.
Don't fear the numbers. Embrace the truth.