| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | level of about [num] per cent | 5 |
|
| 2 | level of about [num] per cent | 5 |
|
| 3 | level of about [num] [no cls] cent | 5 |
|
| 4 | level of about [num] [unc] cent | 5 |
|
| 5 | level of about [num] [unc] cent | 5 |
|
