| （単位：%） | DEレシオ（％） | 前年比（％） |
|---|---|---|
| 2024/12 | 16.7 | -3.8% |
| 2023/12 | 17.4 | -18.4% |
| 2022/12 | 21.3 | -22.2% |
| 2021/12 | 27.4 | -11.1% |
| 2020/12 | 30.8 | +5.8% |
| 2019/12 | 29.1 | -2.0% |
| 2018/12 | 29.7 | -4.4% |
| 2017/12 | 31.1 | -1.4% |
| 2016/12 | 31.6 | -8.1% |
| 2015/12 | 34.3 | -3.6% |
| 2014/12 | 35.6 | +119.5% |
| 2013/12 | 16.2 | +54.0% |
| 2012/12 | 10.5 | +2.1% |
| 2011/12 | 10.3 | -16.4% |
| 2010/12 | 12.4 | - |