| （単位：%） | DEレシオ（％） | 前年比（％） |
|---|---|---|
| 2025/5 | 60.3 | -2.3% |
| 2024/5 | 61.7 | -3.2% |
| 2023/5 | 63.7 | +3.4% |
| 2022/5 | 61.6 | -16.4% |
| 2021/5 | 73.7 | -36.9% |
| 2020/5 | 116.8 | +204.3% |
| 2019/5 | 38.4 | +8.4% |
| 2018/5 | 35.4 | +26.3% |
| 2017/5 | 28.0 | +68.6% |
| 2016/5 | 16.6 | +78.0% |
| 2015/5 | 9.3 | -16.2% |
| 2014/5 | 11.1 | -1.9% |
| 2013/5 | 11.4 | +325.6% |
| 2012/5 | 2.7 | -44.8% |
| 2011/5 | 4.8 | +4.1% |
| 2010/5 | 4.6 | - |