Study the table below, which shows the annual sediment yield (t km−2 yr−1\text{t km}^{-2}\text{ yr}^{-1}t km−2 yr−1) recorded across 12 drainage basins in an upland catchment.
| Basin | Sediment Yield (t km−2 yr−1\text{t km}^{-2}\text{ yr}^{-1}t km−2 yr−1) |
|---|---|
| A | 124 |
| B | 98 |
| C | 156 |
| D | 112 |
| E | 85 |
| F | 143 |
| G | 131 |
| H | 95 |
| I | 104 |
| J | 167 |
| K | 118 |
| L | 136 |
Calculate the mean sediment yield for these 12 basins to two decimal places (2dp).
Show your working.