| Year | Month | Dividend (%) |
|---|---|---|
| 2025 | May | 110 |
| 2024 | Apr | 150 |
| 2023 | May | 175 |
| 2022 | Apr | 125 |
| 2021 | May | 100 |
| 2020 | May | 110 |
| 2019 | May | 125 |
| 2018 | May | 110 |
| 2018 | May | 110 |
| 2017 | May | 110 |
| 2016 | May | 100 |
| 2015 | May | 100 |
| 2015 | May | 25 |
| 2014 | May | 100 |
| 2013 | May | 100 |
| 2012 | May | 100 |
| 2011 | May | 100 |
| 2010 | May | 90 |
| 2009 | May | 90 |
| 2008 | Jun | 90 |
| 2007 | May | 80 |
| 2006 | May | 70 |
| 2005 | May | 65 |
| 2004 | Jun | 55 |
| 2003 | Apr | 55 |
| 2002 | Apr | 50 |
| 2001 | May | 50 |
| 2000 | Mar | 50 |
| 1999 | May | 50 |
| 1998 | Jun | 65 |
| 1997 | Jul | 65 |
| 1997 | Jan | 13 |