| Year | Month | Dividend (%) |
|---|---|---|
| 2025 | May | 15 |
| 2024 | May | 15 |
| 2023 | May | 15 |
| 2022 | May | 15 |
| 2021 | May | 15 |
| 2020 | Jun | 10 |
| 2019 | May | 5 |
| 2018 | May | 5 |
| 2017 | May | 8 |
| 2016 | May | 5 |
| 2015 | May | 20 |
| 2014 | May | 30 |
| 2013 | May | 60 |
| 2012 | May | 60 |
| 2011 | Apr | 60 |
| 2010 | May | 60 |
| 2009 | Apr | 55 |
| 2008 | Apr | 50 |
| 2007 | Apr | 20 |
| 1999 | Apr | - |
| 1997 | May | 10 |