| Characteristic Value | Contribution Rate (%) | Cumulative Contribution Rate (%) |
F1 | 6.821 | 22.74 | 22.74 |
F2 | 6.574 | 21.91 | 44.65 |
F3 | 4.407 | 14.69 | 59.34 |
F4 | 3.520 | 11.73 | 71.07 |