| 経常（税引前）利益率（％） | 前年比（％） | |
|---|---|---|
| 2025/5 | 9.02 | -25.2% |
| 2024/5 | 12.06 | +35.9% |
| 2023/5 | 8.87 | -3.6% |
| 2022/5 | 9.2 | +81.0% |
| 2021/5 | 5.09 | -52.6% |
| 2020/5 | 10.72 | -23.5% |
| 2019/5 | 14.02 | +13.9% |
| 2018/5 | 12.31 | +1.9% |
| 2017/5 | 12.08 | +1.0% |
| 2016/5 | 11.95 | +0.3% |
| 2015/5 | 11.92 | +30.3% |
| 2014/5 | 9.15 | +301.5% |
| 2013/5 | 2.28 | -720.9% |
| 2012/5 | -0.37 | -96.0% |
| 2011/5 | -9.17 | - |