| January |
| February |
| March |
| April |
| May |
| June |
| July |
| August |
| September |
| October |
| November |
| December |
|
| $ per Gallon | 2.88 | 2.72 |
| $ per Liter | 0.760 | 0.717 |
| $ per Gallon | 2.96 | 2.76 |
| $ per Liter | 0.782 | 0.730 |
| $ per Gallon | 3.22 | 3.00 |
| $ per Liter | 0.850 | 0.791 |
| $ per Gallon | 3.31 | 2.96 |
| $ per Liter | 0.875 | 0.782 |
| $ per Gallon | 3.08 | 2.87 |
| $ per Liter | 0.814 | 0.759 |
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