| 1997 |
| 1998 |
| 1998−1 |
| 1998 |
| 1 |
| 1998 |
-
| 97 |
| 98 |
| 98−1 |
| 98 |
| 1 |
| 98 |
−
| 1998 |
| 1999 |
| 1999−1 |
| 1999 |
| 1 |
| 1999 |
−
| 98 |
| 99 |
| 99−1 |
| 99 |
| 1 |
| 99 |
∵
| 1 |
| 98 |
| 1 |
| 99 |
| 1 |
| 1998 |
| 1 |
| 1999 |
∴−
| 1998 |
| 1999 |
| 1997 |
| 1998 |
| 98 |
| 99 |
| 97 |
| 98 |
| 1997 |
| 1998 |
| 97 |
| 98 |
| 1998 |
| 1999 |
| 98 |
| 99 |
| 1997 |
| 1998 |
| 1998−1 |
| 1998 |
| 1 |
| 1998 |
| 97 |
| 98 |
| 98−1 |
| 98 |
| 1 |
| 98 |
| 1998 |
| 1999 |
| 1999−1 |
| 1999 |
| 1 |
| 1999 |
| 98 |
| 99 |
| 99−1 |
| 99 |
| 1 |
| 99 |
| 1 |
| 98 |
| 1 |
| 99 |
| 1 |
| 1998 |
| 1 |
| 1999 |
| 1998 |
| 1999 |
| 1997 |
| 1998 |
| 98 |
| 99 |
| 97 |
| 98 |