| （単位：%） | 経常（税引前）利益率（％） | 前年比（％） |
|---|---|---|
| 2025/5 | -76.5 | +50.3% |
| 2024/5 | -50.9 | +64.6% |
| 2023/5 | -30.9 | +54.1% |
| 2022/5 | -20.1 | +165.1% |
| 2021/5 | -7.6 | -266.9% |
| 2020/5 | 4.5 | +518.9% |
| 2019/5 | 0.7 | -90.7% |
| 2018/5 | 7.9 | -33.4% |
| 2017/5 | 11.8 | -153.9% |
| 2016/5 | -21.9 | -19.7% |
| 2015/5 | -27.2 | -846.9% |
| 2014/5 | 3.6 | -51.2% |
| 2013/5 | 7.5 | +127.4% |
| 2012/5 | 3.3 | -74.0% |
| 2011/5 | 12.6 | - |