| Year | Month | Dividend (%) |
|---|---|---|
| 2025 | May | 25 |
| 2024 | May | 25 |
| 2023 | May | 25 |
| 2022 | May | 15 |
| 2021 | May | 15 |
| 2020 | May | 15 |
| 2019 | May | 25 |
| 2018 | May | 25 |
| 2017 | May | 25 |
| 2016 | May | 25 |
| 2015 | May | 25 |
| 2014 | May | 20 |
| 2013 | May | 35 |
| 2012 | May | 20 |
| 2011 | Mar | 100 |
| 2010 | Jun | 100 |
| 2009 | Jun | 130 |
| 2008 | Jun | 90 |
| 2007 | Jun | 70 |
| 2006 | May | 70 |
| 2005 | May | 70 |
| 2004 | Jun | 100 |
| 2003 | Jun | 50 |
| 1997 | Aug | 15 |