| Year | Real GDP (£ billions) | Population (millions) |
|---|---|---|
| 2021 | 142.5 | 4.2 |
| 2022 | 148.2 | 4.3 |
| 2023 | 153.8 | 4.5 |
Using the Real GDP data above, which one of the following represents the index number for 2021, if 2022 is the base year?
92.792.792.7
96.296.296.2
97.797.797.7
103.8103.8103.8
