| Year | Season Best | Age | vs Prior Year | % Change | |
|---|---|---|---|---|---|
| 2026 | 4:00.77 | 33.1 | -3.14 | -1.32% | |
| 2025 | 3:57.63 | 32.3 | -4.26 | -1.83% | |
| 2024 | 3:53.37 | 31.3 | +1.79 | +0.76% | PB |
| 2023 | 3:55.16 | 30.4 | +0.22 | +0.09% | |
| 2022 | 3:55.38 | 29.2 | -0.88 | -0.38% | |
| 2021 | 3:54.50 | 28.2 | +2.90 | +1.22% | PB |
| 2020 | 3:57.40 | 27.3 | -1.64 | -0.70% | |
| 2019 | 3:55.76 | 26.4 | +2.42 | +1.02% | |
| 2018 | 3:58.18 | 25.2 | +2.29 | +0.95% | |
| 2017 | 4:00.47 | 24.0 | -5.25 | -2.23% | |
| 2016 | 3:55.22 | 23.3 | +3.44 | +1.44% | PB |
| 2015 | 3:58.66 | 22.2 | +1.41 | +0.59% | PB |
| 2014 | 4:00.07 | 21.2 | +nan | +nan% | PB |