| 1981 | X | 1 | = | 1981 |
| 1981 | X | 2 | = | 3962 |
| 1981 | X | 3 | = | 5943 |
| 1981 | X | 4 | = | 7924 |
| 1981 | X | 5 | = | 9905 |
| 1981 | X | 6 | = | 11886 |
| 1981 | X | 7 | = | 13867 |
| 1981 | X | 8 | = | 15848 |
| 1981 | X | 9 | = | 17829 |
| 1981 | X | 10 | = | 19810 |
| 1981 | X | 11 | = | 21791 |
| 1981 | X | 12 | = | 23772 |
| 1981 | X | 13 | = | 25753 |
| 1981 | X | 14 | = | 27734 |
| 1981 | X | 15 | = | 29715 |
| 1981 | X | 16 | = | 31696 |
| 1981 | X | 17 | = | 33677 |
| 1981 | X | 18 | = | 35658 |
| 1981 | X | 19 | = | 37639 |
| 1981 | X | 20 | = | 39620 |