| Variable | ADF | |
| Level | First Difference | |
| Lny | −2.54314 | −6.35070* |
| Lni | −0.88105 | −9.6493* |
| Lng | −1.6792 | −7.9251* |
| Lnh | −2.5638 | −6.9856* |
| Lnx | −1.7692 | −8.6591* |
| Lnp | −2.9830 | −5.7628* |
| Lnc | −1.6040 | −7.9823* |