| Year | Month | Dividend (%) |
|---|---|---|
| 2025 | May | 50 |
| 2024 | May | 110 |
| 2023 | May | 24 |
| 2019 | May | 5 |
| 2018 | May | 18 |
| 2017 | May | 20 |
| 2016 | May | 20 |
| 2015 | Jun | 26 |
| 2014 | May | 26 |
| 2013 | May | 14 |
| 2012 | Aug | 12 |
| 2011 | Aug | 22 |
| 2010 | Aug | 18 |
| 2009 | Jun | 18 |
| 2008 | Jun | 45 |
| 2007 | Apr | 27 |
| 2006 | May | 21 |
| 2005 | Apr | 21 |
| 1997 | Jun | 8 |