| Year | Month | Dividend (%) |
|---|---|---|
| 2025 | May | 55 |
| 2024 | May | 55 |
| 2023 | May | 55 |
| 2022 | May | 50 |
| 2021 | Jun | 40 |
| 2020 | Jun | 25 |
| 2020 | Feb | 20 |
| 2018 | May | 20 |
| 2017 | May | 20 |
| 2016 | May | 22 |
| 2015 | Jun | 27 |
| 2014 | May | 25 |
| 2013 | May | 22 |
| 2012 | Jul | 22 |
| 2011 | Jul | 20 |
| 2010 | Jul | 17 |
| 2009 | Jun | 12 |
| 2008 | Sep | 12 |
| 2006 | May | 10 |
| 2005 | May | 10 |
| 2004 | Aug | 10 |
| 2003 | Jun | 8 |
| 2002 | Jul | 10 |
| 2001 | Jul | 8 |
| 1999 | Aug | 8 |