| Year | Month | Dividend (%) |
|---|---|---|
| 2025 | May | 41 |
| 2024 | May | 28 |
| 2023 | May | 20 |
| 2022 | May | 20 |
| 2015 | May | 50 |
| 2014 | Jan | 50 |
| 2013 | May | 100 |
| 2012 | Apr | 70 |
| 2011 | May | 70 |
| 2010 | May | 70 |
| 2009 | Apr | 50 |
| 2009 | Feb | 30 |
| 2008 | Apr | 40 |
| 2007 | Apr | 15 |
| 2006 | Dec | 20 |
| 2006 | Apr | 30 |
| 2005 | Apr | 10 |
| 2005 | Feb | 10 |
| 2004 | May | 10 |
| 2004 | Jan | 20 |
| 2003 | Apr | 30 |
| 2002 | May | 25 |
| 2001 | Jun | 15 |
| 2000 | Apr | 10 |
| 1999 | Jun | 10 |
| 1997 | Jun | 15 |