| 経常（税引前）利益率（％） | 前年比（％） | |
|---|---|---|
| 2025/5 | 9.96 | -35.6% |
| 2024/5 | 15.46 | +142.5% |
| 2023/5 | 6.38 | -14.9% |
| 2022/5 | 7.49 | -21.0% |
| 2021/5 | 9.47 | -32.6% |
| 2020/5 | 14.04 | +75.1% |
| 2019/5 | 8.02 | +823.6% |
| 2018/5 | 0.87 | -23.1% |
| 2017/5 | 1.13 | -69.3% |
| 2016/5 | 3.68 | +102.4% |
| 2015/5 | 1.82 | -34.3% |
| 2014/5 | 2.77 | -54.7% |
| 2013/5 | 6.11 | -10.4% |
| 2012/5 | 6.82 | -21.3% |
| 2011/5 | 8.66 | - |