Using Table 1, calculate the change in Ghana's terms of trade between 2020 and 2021.
Table 1 – Ghana's trade indicators and current account position, 2018–22
| Year | Index of export prices | Index of import prices | Index of export volumes | Index of import volumes | Balance on the current account of the balance of payments as % of GDP |
|---|---|---|---|---|---|
| 2018 | 95 | 97 | 101 | 98 | –2.4 |
| 2019 | 100 | 100 | 105 | 103 | –1.9 |
| 2020 | 106 | 102 | 102 | 101 | –3.2 |
| 2021 | 114 | 111 | 108 | 107 | –2.8 |
| 2022 | 112 | 115 | 106 | 110 | –4.1 |
