| Year | Month | Dividend (%) |
|---|---|---|
| 2025 | May | 100 |
| 2024 | May | 75 |
| 2023 | Jul | 100 |
| 2022 | May | 100 |
| 2021 | Mar | 100 |
| 2020 | Feb | 50 |
| 2019 | May | 50 |
| 2018 | May | 50 |
| 2017 | May | 50 |
| 2016 | Mar | 50 |
| 2015 | Jun | 30 |
| 2014 | May | 25 |
| 2013 | May | 20 |
| 2013 | Jan | 90 |
| 2012 | May | 20 |
| 2012 | Mar | 90 |
| 2011 | May | 40 |
| 2010 | Oct | 50 |
| 2010 | May | 40 |
| 2009 | Oct | 45 |
| 2009 | May | 50 |
| 2009 | Jan | 50 |
| 2008 | Oct | 50 |
| 2008 | Jul | 50 |
| 2008 | Jan | 50 |
| 2007 | Oct | 50 |
| 2007 | May | 50 |
| 2007 | Jan | 50 |
| 2006 | Oct | 50 |
| 2006 | May | 50 |
| 2006 | Jan | 50 |
| 2005 | Oct | 50 |
| 2005 | Jun | 40 |
| 2005 | Jan | 30 |
| 2004 | Aug | 30 |
| 2004 | Jun | 50 |
| 2003 | Oct | 25 |
| 2003 | Jun | 60 |
| 2002 | Jun | 55 |
| 2001 | Jun | 50 |
| 2000 | Feb | 50 |
| 1999 | Jul | 50 |