| Y1 | Y2 | Y3 | Y4 |
Y1 | 1.000 | 0.849 | 0.871 | 0.934 |
Y2 | 0.849 | 1.000 | 0.992 | 0.705 |
Y3 | 0.871 | 0.992 | 1.000 | 0.731 |
Y4 | 0.934 | 0.705 | 0.731 | 1.000 |
均值 | 0.9135 | 0.8865 | 0.8985 | 0.8425 |