| Variable | lnCPS/Y | lnCPS/DC | lnm2+/Y | lnM1/M2+ | lnDC/Y |
| lnCPS/Y | 1.00 |
| |||
| lnCPS/DC | −0.47 | 1.00 |
| ||
| lnM2+/Y | 0.87 | −0.70 | 1.00 |
| |
| lnM1/M2+ | −0.85 | 0.74 | −0.90 | 1.00 |
|
| lnDC/Y | 0.88 | −0.84 | 0.92 | −0.93 | 1.00 |