| Year | Month | Dividend (%) |
|---|---|---|
| 2025 | May | 25 |
| 2024 | May | 35 |
| 2023 | May | 70 |
| 2022 | May | 65 |
| 2021 | May | 60 |
| 2020 | Feb | 50 |
| 2019 | May | 50 |
| 2018 | May | 45 |
| 2017 | May | 40 |
| 2016 | Jan | 40 |
| 2014 | May | 42 |
| 2013 | Oct | 35 |
| 2012 | Jul | 40 |
| 2012 | Feb | 30 |
| 2011 | Feb | 30 |
| 2010 | Feb | 20 |
| 2009 | May | 20 |
| 2008 | Jul | 20 |
| 2008 | Jan | 20 |
| 2007 | Jul | 18 |
| 2006 | Jul | 12 |
| 2005 | Jun | 11 |
| 2004 | May | 10 |
| 2003 | Mar | 6 |
| 2002 | Oct | 6 |
| 2001 | Jul | - |
| 2000 | May | 5 |
| 1999 | Jan | 6 |
| 1997 | Jul | 12 |