| Year | Month | Ratio | Ex Bonus Date |
|---|---|---|---|
| 2017 | Nov | 1:1 | 21/12/2017 |
| 2012 | Jul | 1:1 | 04/09/2012 |
| 2010 | Feb | 1:1 | 09/04/2010 |
| 1999 | Apr | 1:1 | 17/05/1999 |
| 1995 | Feb | 3:5 | 05/05/1995 |
| 1994 | Jan | 1:1 | 18/02/1994 |
| 1992 | Sep | 3:5 | 22/05/1992 |
| 1992 | Feb | 3:5 | 22/05/1992 |
| 1991 | Oct | 3:5 | - |
| 1990 | Dec | 3:5 | 21/11/1990 |
| 1990 | Oct | 3:5 | - |
| 1990 | Aug | 3:5 | 21/11/1990 |