| （単位：%） | DEレシオ（％） | 前年比（％） |
|---|---|---|
| 2024/12 | 35.5 | -0.9% |
| 2023/12 | 35.9 | -9.9% |
| 2022/12 | 39.8 | +49.9% |
| 2021/12 | 26.5 | +3.1% |
| 2020/12 | 25.8 | +1.3% |
| 2019/12 | 25.4 | -10.6% |
| 2018/12 | 28.5 | +15.7% |
| 2017/12 | 24.6 | -19.0% |
| 2016/12 | 30.4 | -13.5% |
| 2015/12 | 35.1 | +41.9% |
| 2014/12 | 24.7 | -7.0% |
| 2013/12 | 26.6 | -2.7% |
| 2012/12 | 27.3 | +74.9% |
| 2011/12 | 15.6 | -2.5% |
| 2010/12 | 16.0 | - |