| 経常（税引前）利益率（％） | 前年比（％） | |
|---|---|---|
| 2025/5 | 35.49 | -2.7% |
| 2024/5 | 36.46 | +10.6% |
| 2023/5 | 32.96 | -0.3% |
| 2022/5 | 33.06 | +7.9% |
| 2021/5 | 30.65 | +9.3% |
| 2020/5 | 28.05 | +21.7% |
| 2019/5 | 23.04 | +15.5% |
| 2018/5 | 19.95 | +19.7% |
| 2017/5 | 16.67 | +8.7% |
| 2016/5 | 15.34 | +361.2% |
| 2015/5 | 3.33 | +113.6% |
| 2014/5 | 1.56 | -135.7% |
| 2013/5 | -4.36 | -68.1% |
| 2012/5 | -13.69 | -363.1% |
| 2011/5 | 5.2 | - |