| 経常（税引前）利益率（％） | 前年比（％） | |
|---|---|---|
| 2025/5 | 0.26 | -76.1% |
| 2024/5 | 1.1 | +19.1% |
| 2023/5 | 0.92 | -25.1% |
| 2022/5 | 1.23 | -29.3% |
| 2021/5 | 1.74 | +239.5% |
| 2020/5 | 0.51 | +181.6% |
| 2019/5 | 0.18 | -61.0% |
| 2018/5 | 0.47 | -78.1% |
| 2017/5 | 2.13 | +31.3% |
| 2016/5 | 1.62 | -40.1% |
| 2015/5 | 2.71 | -48.5% |
| 2014/5 | 5.27 | +30.0% |
| 2013/5 | 4.05 | +60.5% |
| 2012/5 | 2.52 | +35.7% |
| 2011/5 | 1.86 | - |