| 経常（税引前）利益率（％） | 前年比（％） | |
|---|---|---|
| 2025/5 | 39.05 | -7.1% |
| 2024/5 | 42.02 | +2.7% |
| 2023/5 | 40.91 | +3.4% |
| 2022/5 | 39.56 | +11.9% |
| 2021/5 | 35.35 | -0.6% |
| 2020/5 | 35.57 | -1.9% |
| 2019/5 | 36.26 | -5.4% |
| 2018/5 | 38.34 | -2.9% |
| 2017/5 | 39.5 | +1.3% |
| 2016/5 | 39.0 | +0.8% |
| 2015/5 | 38.69 | -1.4% |
| 2014/5 | 39.23 | +0.1% |
| 2013/5 | 39.18 | +1.5% |
| 2012/5 | 38.58 | +1.5% |
| 2011/5 | 38.01 | +4.3% |
| 2010/5 | 36.45 | - |