| Year | Month | Dividend (%) |
|---|---|---|
| 2025 | May | 30 |
| 2024 | May | 10 |
| 2023 | Aug | 30 |
| 2022 | May | 30 |
| 2021 | Jun | 25 |
| 2020 | Jun | 20 |
| 2019 | May | 20 |
| 2018 | May | 20 |
| 2017 | May | 35 |
| 2016 | May | 32 |
| 2015 | May | 27 |
| 2014 | Jun | 25 |
| 2013 | May | 24 |
| 2012 | Jul | 20 |
| 2011 | Aug | 75 |
| 2010 | Jul | 50 |
| 2009 | Jul | 40 |
| 2008 | Jul | 40 |
| 2007 | Aug | 20 |
| 2007 | Mar | 20 |
| 2002 | Aug | - |
| 2001 | Aug | - |
| 1999 | May | - |