Study the table below, which shows the annual quantity of plastic waste recovered for recycling in a metropolitan region over a 5-year period.
| Year | Plastic waste recovered (thousand tonnes) |
|---|---|
| 2018 | 14.8 |
| 2019 | 16.5 |
| 2020 | 13.2 |
| 2021 | 18.1 |
| 2022 | 15.4 |
What was the mean annual quantity of plastic waste recovered for recycling in this metropolitan region between 2018 and 2022?
15.4 thousand tonnes15.4\text{ thousand tonnes}15.4 thousand tonnes
15.6 thousand tonnes15.6\text{ thousand tonnes}15.6 thousand tonnes
19.5 thousand tonnes19.5\text{ thousand tonnes}19.5 thousand tonnes
15.1 thousand tonnes15.1\text{ thousand tonnes}15.1 thousand tonnes