| Year | Month | Dividend (%) |
|---|---|---|
| 2025 | May | 10 |
| 2024 | May | 28 |
| 2023 | May | 33 |
| 2022 | May | 28 |
| 2016 | Mar | 20 |
| 2015 | May | 20 |
| 2014 | May | 20 |
| 2013 | May | 20 |
| 2012 | May | 20 |
| 2011 | Aug | 20 |
| 2010 | Aug | 20 |
| 2009 | Aug | 20 |
| 2008 | Aug | 20 |
| 2007 | Aug | 20 |
| 2006 | Aug | 25 |
| 2005 | Aug | 20 |
| 2004 | Jul | 20 |
| 2003 | Aug | 20 |
| 2001 | Aug | 15 |
| 2000 | Mar | 20 |
| 1999 | Aug | - |
| 1998 | Jul | 20 |
| 1997 | Aug | 20 |