| Year | Month | Dividend (%) |
|---|---|---|
| 2024 | May | 35 |
| 2023 | May | 35 |
| 2022 | May | 35 |
| 2021 | May | 25 |
| 2021 | Jan | 20 |
| 2020 | Oct | 20 |
| 2020 | Jul | 25 |
| 2019 | May | 25 |
| 2018 | May | 15 |
| 2017 | Oct | 25 |
| 2017 | Jun | 15 |
| 2016 | Mar | 50 |
| 2015 | May | 25 |
| 2014 | Oct | 50 |
| 2013 | May | 10 |
| 2012 | May | 30 |
| 2011 | Jul | 20 |
| 2010 | May | 25 |
| 2009 | Jun | 25 |
| 2008 | Jun | 10 |
| 2007 | Nov | 15 |
| 2007 | Mar | 15 |
| 2007 | Jan | 10 |
| 2006 | May | 10 |
| 2005 | Jun | 10 |
| 2001 | Jul | 12 |
| 1999 | Jul | - |
| 1997 | Jun | 16 |