It's difficult to figure the total worldwide economic benefit from corn production, but just to give you an idea of the scale, the 2011 US corn (for grain) production was valued at $76.46 billion dollars.
In 2011, Iowa produced 2.4 billion bushels of corn. Nebraska produced 1.5 billion bushels of corn. Illinois produced 1.9 billion bushels of corn.
corn flour comes from cooking ingredients
Tennessee produces about 59,520,000 bushels of corn per year.
roughly 20 percent
In 2001 the U.S. corn crop was estimated at 9.5 billion bushels.
As much as he/she produces
Each year the amount of corn produced is different due to various factors. In 2008, the US produced 307386.00 (1000 MT) of corn. Source: http://www.pecad.fas.usda.gov/cropexplorer/cropview/CommodityView.cfm
It very much depends on the amount of corn produced, as if less corn is produced the prices rise and if more corn is harvested the prices drop- however, in the latter circumstance there is usually more to buy...
It depends.
On average, about 825 million metric tons worldwide.
Corn starch, iodine and water.
It depends on the country where it was grown and where it is being distributed.