| Variables | IG | C | M | DR | Y | DP | I | POP | OC | COR | BG | SP | KH |
| IG | 1 |
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| C | −0.3 | 1 |
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| M | −0.3 | 0.8 | 1 |
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| GR | 0.03 | −0.5 | −0.4 | 1 |
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| Y | 0.3 | −0.1 | −0.2 | −0.008 | 1 |
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| DP | −0.1 | 0.2 | 0.1 | 0.2 | 0.2 | 1 |
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| I | 0.4 | −0.2 | −0.2 | −0.2 | 0.4 | 0.001 | 1 |
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| POP | 0.2 | −0.1 | −0.1 | 0.03 | 0.1 | 0.02 | 0.2 | 1 |
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| OC | −0.07 | 0.1 | 0.2 | −0.07 | 0.01 | 0.1 | −0.3 | 0.01 | 1 |
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| COR | −0.5 | 0.5 | 0.3 | −0.2 | −0.1 | 0.1 | −0.4 | −0.2 | 0.1 | 1 |
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| BG | −0.4 | 0.4 | 0.3 | −0.2 | −0.006 | 0.1 | −0.4 | −0.1 | 0.3 | 0.8 | 1 |
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| SP | −0.02 | 0.2 | 0.1 | −0.4 | 0.08 | 0.09 | 0.01 | 0.01 | 0.3 | 0.2 | 0.4 | 1 |
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| KH | −0.03 | 0.2 | 0.4 | −0.6 | −0.03 | −0.3 | 0.2 | −0.03 | 0.07 | −0.09 | 0.01 | 0.2 | 1 |