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| Principal component | Characteristic root | Contribution rate (%) | Cumulative contribution rate (%) |
|---|---|---|---|
| 1 | 2.644 | 44.066 | 44.066 |
| 2 | 1.692 | 28.206 | 72.271 |
| 3 | 0.802 | 13.368 | 85.639 |
| 4 | 0.363 | 6.053 | 91.692 |
| 5 | 0.291 | 4.843 | 96.534 |
| 6 | 0.208 | 3.466 | 100 |
