| Year | Month | Dividend (%) |
|---|---|---|
| 2025 | Jun | 70 |
| 2025 | Jan | 45 |
| 2024 | Jun | 74 |
| 2023 | May | 40 |
| 2023 | Jan | 30 |
| 2022 | May | 83 |
| 2021 | May | 10 |
| 2020 | Jun | 27 |
| 2020 | Feb | 30 |
| 2019 | May | 48 |
| 2019 | Feb | 33 |
| 2018 | May | 90 |
| 2018 | Feb | 60 |
| 2017 | Jun | 80 |
| 2017 | Feb | 50 |
| 2016 | May | 55 |
| 2016 | Feb | 35 |
| 2015 | May | 45 |
| 2015 | Feb | 30 |
| 2014 | May | 42 |
| 2013 | Dec | 40 |
| 2013 | May | 81 |
| 2012 | May | 60 |
| 2012 | Mar | 40 |
| 2011 | Jun | 65 |
| 2010 | May | 45 |
| 2009 | Jun | 55 |
| 2008 | Apr | 40 |
| 2008 | Jan | 30 |
| 2007 | Mar | 35 |
| 2007 | Feb | 30 |
| 2006 | Apr | 35 |
| 2006 | Jan | 30 |
| 2005 | Apr | 45 |
| 2004 | Dec | 30 |
| 2004 | Jun | 25 |
| 2004 | Jan | 30 |
| 2002 | Jul | 25 |
| 2001 | Jul | - |
| 2000 | May | 15 |
| 2000 | Jan | 10 |
| 1999 | Aug | 25 |