| Year | Month | Dividend (%) |
|---|---|---|
| 2025 | May | 20 |
| 2024 | May | 30 |
| 2023 | May | 30 |
| 2022 | May | 30 |
| 2021 | May | 20 |
| 2020 | Mar | - |
| 2019 | May | 25 |
| 2018 | May | 25 |
| 2017 | May | 18 |
| 2016 | May | 12 |
| 2015 | May | 10 |
| 2014 | Apr | 6 |
| 2013 | May | 6 |
| 2012 | May | 6 |
| 2011 | May | 6 |
| 2010 | May | 6 |
| 2009 | Jun | 6 |
| 2008 | May | 5 |
| 2007 | Jun | 5 |
| 2006 | May | 5 |
| 1998 | Sep | 10 |
| 1997 | Jun | - |