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Results of principal component analysis.
| Parameter | Principal component 1 | Principal component 2 | Principal component 3 |
|---|---|---|---|
| Eigenvalue | 14.68 | 2.249 | 1.261 |
| Variance contribution rate | 73.40% | 11.24% | 6.30% |
| Cumulative variance contribution rate | 73.402% | 84.647% | 90.951% |
