| Year | Month | Dividend (%) |
|---|---|---|
| 2024 | May | 25 |
| 2023 | May | 100 |
| 2022 | May | 25 |
| 2021 | Jun | 25 |
| 2020 | Jun | 50 |
| 2019 | May | 60 |
| 2019 | Jan | 50 |
| 2018 | May | 60 |
| 2018 | Feb | 40 |
| 2017 | May | 50 |
| 2017 | Apr | 50 |
| 2016 | May | 25 |
| 2015 | May | 10 |
| 2014 | May | 10 |
| 2013 | May | 10 |
| 2012 | May | 100 |
| 2012 | Jan | 100 |
| 2011 | Apr | 150 |
| 2010 | May | 150 |
| 2009 | Jun | 150 |
| 2008 | Apr | 70 |
| 2007 | Oct | 50 |
| 2007 | May | 60 |
| 2007 | Jan | 40 |
| 1998 | Jun | 10 |
| 1997 | May | 25 |