| ADF | ZA | PP | DFGLS | KPSS |
| −1.597 | −5.424** | 0.365 | −1.215 | 0.360*** |
| −1.255 | −5.504** | 0.100 | −1.893 | 0.403*** |
| −6.510*** | −7.537*** | −6.385*** | −3.848*** | 0.058 |
| −8.270*** | −5.341** | −8.382*** | −2.877** | 0.085 |