| Year | Month | Dividend (%) |
|---|---|---|
| 2025 | May | 15 |
| 2024 | Jul | 20 |
| 2019 | May | 20 |
| 2018 | May | 20 |
| 2017 | May | 50 |
| 2016 | May | 30 |
| 2015 | May | 25 |
| 2014 | May | 20 |
| 2013 | May | 15 |
| 2012 | Aug | 15 |
| 2011 | Aug | 15 |
| 2010 | Sep | 15 |
| 2009 | Sep | 12 |
| 2008 | Jul | 10 |
| 2007 | Aug | 15 |
| 2006 | Aug | 15 |
| 2005 | Aug | 15 |
| 2004 | Aug | 10 |
| 2003 | Jun | 10 |
| 2002 | Jun | - |
| 2001 | Aug | - |
| 2000 | Aug | - |
| 1998 | Aug | 10 |
| 1997 | Jun | 10 |