| Year | Ratio | Ex Right Date |
| 1997 | 1:1 | Feb 24, 1997 |
| 1997 | 1:1 | Feb 24, 1997 |
| 1994 | 1:1 | Nov 11, 1994 |
| 1992 | 2:5 | Dec 18, 1992 |
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