Refer to the table below displaying an index of lithium exports for a nation between 2018 and 2021.
| Year | Index of lithium exports (2018=1002018 = 1002018=100) |
|---|---|
| 2018 | 100.0 |
| 2019 | 105.0 |
| 2020 | 110.5 |
| 2021 | 115.5 |
Which one of the following statements is correct?
Between 2018 and 2021, the mean annual rate of growth in the country's exports of lithium was 5.17%5.17\%5.17%
In 2020, the country's exports of lithium grew by 5.5%5.5\%5.5%
The highest rate of growth in the country's exports of lithium was in 2021
The rate of growth in the country's exports of lithium was higher in 2020 than in 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.