| Year | Month | Dividend (%) |
|---|---|---|
| 2025 | May | 25 |
| 2024 | May | 13 |
| 2023 | May | 20 |
| 2022 | May | 20 |
| 2019 | May | 60 |
| 2019 | Feb | 40 |
| 2018 | May | 51 |
| 2018 | Feb | 40 |
| 2017 | May | 39 |
| 2017 | Jan | 40 |
| 2016 | May | 20 |
| 2015 | May | 31 |
| 2015 | Jan | 27 |
| 2014 | May | 76 |
| 2014 | Jan | 66 |
| 2013 | May | 165 |
| 2013 | Jan | 106 |
| 2012 | May | 184 |
| 2012 | Feb | 136 |
| 2011 | May | 179 |
| 2011 | Mar | 133 |
| 2010 | May | 123 |
| 2010 | Jan | 110 |
| 2009 | May | 80 |
| 2009 | Jan | 90 |
| 2008 | May | 63 |
| 2008 | Jan | 90 |
| 2007 | May | 60 |
| 2007 | Jan | 125 |
| 2006 | Jun | 20 |
| 2006 | Mar | 85 |
| 2005 | Dec | 40 |
| 2005 | May | 45 |
| 2004 | Dec | 35 |
| 2004 | Aug | 30 |
| 2004 | Mar | 30 |
| 2003 | Aug | 40 |
| 2002 | Jun | 40 |
| 2001 | Jun | 30 |
| 2000 | Aug | 15 |
| 2000 | Apr | 15 |
| 1999 | Aug | 25 |
| 1998 | Aug | 25 |
| 1997 | Aug | 20 |