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 .
187 exam-style questions on AQA A Level Economics 2.1 The measurement of macroeconomic performance, covering 2.1.1 The objectives of government economic policy, 2.1.2 Macroeconomic indicators, 2.1.3 Uses of index numbers, and 2.1.4 Uses of national income data (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.