| Year | Month | Dividend (%) |
|---|---|---|
| 2025 | May | 130 |
| 2024 | May | 55 |
| 2023 | May | 55 |
| 2022 | May | 55 |
| 2021 | May | 55 |
| 2020 | Feb | 65 |
| 2019 | May | 65 |
| 2019 | Feb | 60 |
| 2018 | May | 65 |
| 2018 | Feb | 60 |
| 2017 | Feb | 63 |
| 2016 | May | 175 |
| 2016 | Feb | 75 |
| 2015 | May | 25 |
| 2015 | Feb | 75 |
| 2014 | May | 25 |
| 2014 | Feb | 75 |
| 2013 | May | 25 |
| 2013 | Jan | 75 |
| 2012 | Apr | 50 |
| 2012 | Feb | 100 |
| 2011 | May | 75 |
| 2011 | Jan | 75 |
| 2010 | May | 75 |
| 2009 | May | 50 |
| 2008 | May | 50 |
| 2007 | Apr | 75 |
| 2006 | Apr | 60 |
| 2006 | Mar | 175 |
| 2005 | May | 70 |
| 2004 | Jun | 100 |
| 2003 | Jun | 90 |
| 2002 | May | 55 |
| 2001 | May | 50 |
| 2000 | Apr | 25 |
| 2000 | Jan | 15 |
| 1999 | May | 15 |
| 1999 | Jan | 10 |
| 1998 | Jun | 10 |
| 1997 | Feb | 10 |