The table below outlines how import and export prices in a country have changed over time.
| Year | Price index of exports | Price index of imports |
|---|---|---|
| 2015 | 104 | 115 |
| 2023 | 112 | 118 |
How much has the country's terms of trade increased by between 2015 and 2023?
2.6%
4.5%
5.0%
7.7%
