| Discount Rate | Years |
| 2.75 | 2014 |
| 9.75 | 2015 |
| 11.25 | 2016 |
| 16.75 | 2017 |
| 17.75 | 2018 |
| 12.75 | 2019 |
| 9.25 | 2020 |
| 8.75 | 2021 |
| 11.75 | 2022 |
| 18.75 | 2023 |