| Year | Ratio | Ex Bonus Date |
| 2025 | 1:2 | Jul 18, 2025 |
| 2022 | 1:2 | Oct 03, 2022 |
| 2018 | 1:2 | Oct 30, 2018 |
| 2017 | 1:2 | Jul 05, 2017 |
| 2015 | 1:2 | Jul 23, 2015 |
| 2013 | 1:2 | Dec 20, 2013 |
| 2012 | 1:2 | Oct 03, 2012 |
| 2007 | 1:2 | Aug 30, 2007 |
| 2005 | 1:2 | Feb 24, 2005 |
| 2000 | 1:2 | Nov 15, 2000 |
| 1997 | 1:2 | Dec 01, 1997 |
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