Study the table below, which shows the annual meltwater runoff volume from a retreating glacier in Svalbard over a 5-year period.
| Year | Annual meltwater runoff (106 m310^6\text{ m}^3106 m3) |
|---|---|
| 2018 | 14.2 |
| 2019 | 15.6 |
| 2020 | 13.1 |
| 2021 | 17.8 |
| 2022 | 16.3 |
What was the mean annual meltwater runoff over this 5-year period?
15.4×106 m315.4 \times 10^6\text{ m}^315.4×106 m3
15.6×106 m315.6 \times 10^6\text{ m}^315.6×106 m3
16.3×106 m316.3 \times 10^6\text{ m}^316.3×106 m3
19.25×106 m319.25 \times 10^6\text{ m}^319.25×106 m3