According to Grain SA, South Africa consumes about 3 million tons of wheat each year - 2 million grown locally and the other million imported. Isn't it weird to think that this huge field doesn't even scratch the surface of all the wheat that we consume?
An interesting fact I picked up is that since the beginning of the year the price of wheat has fallen from around 2,600 ZAR per ton to about 2,150 ZAR per ton, which I guess (though I'm no economist) indicates slightly less demand than supply.
Perhaps South Africa is trying to lose weight. "Eat less starch, eat less starch!" ;)