| Year | Month | Dividend (%) |
|---|---|---|
| 2025 | May | 45 |
| 2024 | May | 20 |
| 2024 | May | 40 |
| 2023 | May | 40 |
| 2019 | May | 38 |
| 2018 | May | 38 |
| 2017 | May | 38 |
| 2016 | May | 38 |
| 2015 | May | 50 |
| 2014 | Feb | 38 |
| 2013 | Feb | 38 |
| 2012 | Feb | 38 |
| 2011 | Feb | 38 |
| 2010 | Mar | 38 |
| 2009 | Mar | 38 |
| 2008 | Mar | 50 |
| 2007 | Mar | 50 |
| 2005 | Dec | 38 |
| 2004 | Dec | 38 |
| 2003 | Dec | 38 |
| 2002 | Dec | 33 |
| 2001 | Dec | 28 |
| 2001 | Mar | 33 |
| 2000 | Feb | 50 |
| 1999 | Feb | 50 |
| 1998 | Mar | 45 |
| 1997 | Mar | 55 |