| （単位：%） | DEレシオ（％） | 前年比（％） |
|---|---|---|
| 2024/12 | 49.7 | +7.7% |
| 2023/12 | 46.2 | -2.5% |
| 2022/12 | 47.4 | -15.1% |
| 2021/12 | 55.8 | -16.2% |
| 2020/12 | 66.6 | +0.4% |
| 2019/12 | 66.3 | -16.3% |
| 2018/12 | 79.3 | -8.3% |
| 2017/12 | 86.4 | -25.7% |
| 2016/12 | 116.3 | -0.0% |
| 2015/12 | 116.3 | +432.0% |
| 2014/12 | 21.9 | -17.7% |
| 2013/12 | 26.5 | -9.5% |
| 2012/12 | 29.3 | +2.6% |
| 2011/12 | 28.6 | +44.4% |
| 2010/12 | 19.8 | - |