| Year | Month | Dividend (%) |
|---|---|---|
| 2025 | May | 20 |
| 2024 | May | 20 |
| 2023 | May | 30 |
| 2022 | May | 30 |
| 2021 | Aug | 20 |
| 2020 | Jun | 10 |
| 2019 | May | 18 |
| 2018 | May | 15 |
| 2017 | May | 15 |
| 2016 | May | 20 |
| 2015 | May | 18 |
| 2014 | May | 15 |
| 2013 | May | 15 |
| 2012 | Aug | 15 |
| 2011 | May | 30 |
| 2010 | May | 20 |
| 2007 | May | 20 |
| 2006 | Jul | 20 |
| 2005 | Jul | 18 |
| 2004 | Jun | 15 |
| 2002 | Jun | - |
| 2001 | Jun | 10 |
| 2000 | May | 8 |
| 1997 | May | 20 |