Table 2.
Principal component analysis: Total variance explained
| Factor | % of variance | Cumulative % |
| 1 | 26.55 | 26.55 |
| 2 | 7.68 | 34.24 |
| 3 | 6.77 | 41.01 |
| 4 | 6.55 | 47.56 |
| 5 | 5.65 | 53.22 |
| 6 | 5.06 | 58.28 |
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