World corn usage would be domestic usage plus exports.

For 09-10 it was right an 919 MMT

10-11   was about 939 MMT

11-12 projected  965 MMT. 

That's an increase of 46MMT, or, about 1.8 billion bu in 3 years. 

Coarse grains

09*10  1237 MMT

11-12 projected 1273 MMT

Soybeans

09-10 usage 330MMT

11-12 projected 345 MMT

Wheat

09-10 usage  785 MMT

11-12 projected 828 MMT

Try to get your head around the fact that we are adding nearly a QUARTER OF A MILLION mouths a DAY around the world right now. 

It would be wrong not to have a chart