| （単位：%） | DEレシオ（％） | 前年比（％） |
|---|---|---|
| 2024/12 | 29.6 | -16.5% |
| 2023/12 | 35.4 | +0.8% |
| 2022/12 | 35.2 | +27.5% |
| 2021/12 | 27.6 | -13.8% |
| 2020/12 | 32.0 | +1.2% |
| 2019/12 | 31.6 | -27.8% |
| 2018/12 | 43.8 | +12.0% |
| 2017/12 | 39.1 | -9.9% |
| 2016/12 | 43.4 | -33.9% |
| 2015/12 | 65.7 | +28.9% |
| 2014/12 | 51.0 | +0.8% |
| 2013/12 | 50.6 | +36.0% |
| 2012/12 | 37.2 | -19.9% |
| 2011/12 | 46.4 | -8.1% |
| 2010/12 | 50.5 | - |