| （単位：%） | DEレシオ（％） | 前年比（％） |
|---|---|---|
| 2024/12 | 63.5 | +4.5% |
| 2023/12 | 60.8 | +15.7% |
| 2022/12 | 52.5 | +29.1% |
| 2021/12 | 40.7 | +10.5% |
| 2020/12 | 36.8 | +3.2% |
| 2019/12 | 35.7 | -35.1% |
| 2018/12 | 54.9 | -19.4% |
| 2017/12 | 68.1 | +51.2% |
| 2016/12 | 45.1 | -4.4% |
| 2015/12 | 47.1 | -20.6% |
| 2014/12 | 59.4 | +86.6% |
| 2013/12 | 31.8 | -26.4% |
| 2012/12 | 43.2 | -11.4% |
| 2011/12 | 48.8 | -33.9% |
| 2010/12 | 73.8 | - |