Using Extract A:
| 2019 | 2020 | 2021 | 2022 (forecast) | |
|---|---|---|---|---|
| Region Alpha generation of solar energy (GWh) | 150 000 | 200 000 | 250 000 | 325 000 |
| Index of Region Alpha generation of solar energy | 60 | 80 | 100 | ? |
| Region Alpha imports of natural gas (GWh) | 450 000 | 360 000 | 300 000 | 210 000 |
| Index of Region Alpha imports of natural gas | 150 | 120 | 100 | 70 |
Note: Indices are based on 2021 = 100.
Calculate the index of Region Alpha's generation of solar energy for 2022 .
Identify one significant feature of the data for the years 2019 to 2021 .
