| （単位：%） | DEレシオ（％） | 前年比（％） |
|---|---|---|
| 2024/12 | 37.3 | +9.1% |
| 2023/12 | 34.2 | -4.1% |
| 2022/12 | 35.7 | -6.4% |
| 2021/12 | 38.1 | -3.2% |
| 2020/12 | 39.4 | -1.4% |
| 2019/12 | 39.9 | -8.4% |
| 2018/12 | 43.6 | +20.3% |
| 2017/12 | 36.2 | -8.2% |
| 2016/12 | 39.4 | +22.0% |
| 2015/12 | 32.3 | +14.3% |
| 2014/12 | 28.3 | -12.3% |
| 2013/12 | 32.2 | -28.7% |
| 2012/6 | 45.2 | +0.8% |
| 2011/6 | 44.8 | -8.6% |
| 2010/6 | 49.0 | - |