| Year | Month | Dividend (%) |
|---|---|---|
| 2025 | May | 70 |
| 2024 | May | 60 |
| 2023 | May | 80 |
| 2022 | May | 100 |
| 2021 | Jun | 100 |
| 2020 | Jun | 66 |
| 2019 | May | 70 |
| 2018 | Oct | 20 |
| 2018 | Aug | 20 |
| 2018 | May | 60 |
| 2017 | Oct | 40 |
| 2017 | May | 23 |
| 2016 | Oct | 30 |
| 2016 | May | 11 |
| 2016 | Mar | 30 |
| 2015 | May | 31 |
| 2014 | Jun | 20 |
| 2013 | Jun | 20 |
| 2012 | Aug | 10 |
| 2011 | May | 35 |
| 2010 | May | 30 |
| 2009 | Jun | 25 |
| 2008 | Jun | 25 |
| 2007 | Jun | 20 |
| 2006 | May | 15 |
| 2005 | Apr | 12 |