| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | april 1991 to | 11 |
|
| 2 | april 1989 to | 8 |
|
| 3 | april 1982 to | 7 |
|
| 4 | april 1990 to | 7 |
|
| 5 | april 1986 to | 5 |
|
