| Month | Test statistics (t) | Significance Level | ||
| 1% | 5% | 10% | ||
| June | 0.03068 | No | No | No |
| July | −1.79494 | No | No | Falling |
| August | −2.31655 | No | Falling | Falling |
| September | −0.75173 | No | No | No |
| October | 0.07671 | No | No | No |