+-----------+-----------+-----------+-----------+-----------+-----------+
| **U.S.    |           |           |           |           |           |
| Corn      |           |           |           |           |           |
| Pr        |           |           |           |           |           |
| oduction: |           |           |           |           |           |
| 1957 --   |           |           |           |           |           |
| 2007**    |           |           |           |           |           |
|           |           |           |           |           |           |
| *         |           |           |           |           |           |
| *(Source: |           |           |           |           |           |
| USDA and  |           |           |           |           |           |
| Consumer  |           |           |           |           |           |
| Price     |           |           |           |           |           |
| Index, US |           |           |           |           |           |
| Bureau of |           |           |           |           |           |
| Labor     |           |           |           |           |           |
| Stat      |           |           |           |           |           |
| istics)** |           |           |           |           |           |
+-----------+-----------+-----------+-----------+-----------+-----------+
| Year      | Acres     | Yield per | Total     | Price per | Price per |
|           | Harvested | Acre      | P         | Bushel    | bushel    |
|           |           |           | roduction |           | (constant |
|           | (million  | (bushels) |           | (nominal  | 2008      |
|           | acres)    |           | (billion  | dollars)  | dollars)  |
|           |           |           | bushels)  |           |           |
+-----------+-----------+-----------+-----------+-----------+-----------+
| 1957      | 63.1      | 48        | 3.05      | \$1.11    | \$8.43    |
+-----------+-----------+-----------+-----------+-----------+-----------+
| 1967      | 60.6      | 80        | 4.86      | \$1.03    | \$6.58    |
+-----------+-----------+-----------+-----------+-----------+-----------+
| 1977      | 71.6      | 91        | 6.51      | \$2.02    | \$7.12    |
+-----------+-----------+-----------+-----------+-----------+-----------+
| 1987      | 59.5      | 120       | 7.13      | \$1.94    | \$3.65    |
+-----------+-----------+-----------+-----------+-----------+-----------+
| 1997      | 72.7      | 127       | 9.2       | \$2.43    | \$3.23    |
+-----------+-----------+-----------+-----------+-----------+-----------+
| 2007      | 86.5      | 151       | 13.1      | \$4.00    | \$4.00    |
+-----------+-----------+-----------+-----------+-----------+-----------+

-   In 2007, the average price of corn was \$4.00 a bushel (stated in
    constant 2008 dollars).

-   In 1957, the average price of corn was \$8.43 a bushel (stated in
    constant 2008 dollars).

-   In 2007, the U.S. produced 13 billion bushels of corn.

-   In 1957, the U.S. produced 3 billion bushels of corn.

-   In 2007, an acre of U.S. farmland yielded 151 bushels per acre.

-   In 1957, an acre of U.S. farmland yielded 48 bushels per acre.