| Sample | ADF statistic | 1% level | 5% level | 10% level | Prob | Stationarity |
| 360001 | −43.27519 | −3.433284 | −2.862722 | −2.567445 | 0.0000 | stable |
| 110022 | −34.73255 | −3.433284 | −2.862722 | −2.567445 | 0.0000 | stable |
| 161812 | −44.00777 | −3.433284 | −2.862722 | −2.567445 | 0.0001 | stable |
| 180003 | −34.41966 | −3.433284 | −2.862722 | −2.567445 | 0.0000 | stable |
| 217016 | −43.82818 | −3.433284 | −2.862722 | −2.567445 | 0.0001 | stable |