Corn’s high carbohydrate content makes it a high-energy feed. An average sample of corn grain contains 70.5 percent carbohydrate (starch), 9.6 percent protein, 0.33 percent P, 0.41 percent K and 4.4 percent oil. Approximately 36 percent of the corn grown in the United States is fed to livestock, 13 percent is exported, and 39 percent is made into ethanol. An equivalent of 12 percent of the corn used as ethanol reenters the feed market as distillers grains. Most of the exported corn is used for livestock feed. The remaining 10 percent of the crop is used for food, seed or industrial purposes.