| （単位：%） | DEレシオ（％） | 前年比（％） |
|---|---|---|
| 2024/12 | 15.8 | +7.0% |
| 2023/12 | 14.8 | -8.0% |
| 2022/12 | 16.1 | -40.4% |
| 2021/12 | 26.9 | -15.8% |
| 2020/12 | 32.0 | +9.5% |
| 2019/12 | 29.2 | -36.1% |
| 2018/12 | 45.7 | +18.7% |
| 2017/12 | 38.5 | -12.9% |
| 2016/12 | 44.2 | +22.0% |
| 2015/12 | 36.2 | -32.3% |
| 2014/12 | 53.5 | +0.3% |
| 2013/12 | 53.4 | +69.4% |
| 2012/12 | 31.5 | -24.7% |
| 2011/12 | 41.8 | +38.5% |
| 2010/12 | 30.2 | - |