| Year | Ratio | Ex Right Date |
| 2021 | 1:9 | Nov 11, 2021 |
| 2017 | 1:5 | Oct 04, 2017 |
| 2014 | 9:40 | Jul 18, 2014 |
| 2007 | 1:5 | Feb 21, 2008 |
| 1992 | 1:3 | May 29, 1992 |
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