| Year | Month | Dividend (%) |
|---|---|---|
| 2025 | May | 220 |
| 2024 | May | 200 |
| 2023 | May | 200 |
| 2022 | May | 115 |
| 2021 | May | 80 |
| 2019 | May | 130 |
| 2018 | May | 120 |
| 2017 | May | 100 |
| 2016 | May | 100 |
| 2015 | Jul | 100 |
| 2014 | May | 100 |
| 2013 | May | 100 |
| 2012 | May | 100 |
| 2011 | Apr | 100 |
| 2010 | Apr | 125 |
| 2009 | Nov | 75 |
| 2009 | May | 130 |
| 2008 | Apr | 60 |
| 2007 | Nov | 60 |
| 2007 | May | 50 |
| 2006 | Oct | 50 |
| 2006 | Apr | 60 |
| 2005 | Oct | 40 |
| 2005 | Apr | 60 |
| 2004 | Oct | 40 |
| 2004 | Apr | 60 |
| 2003 | Oct | 60 |
| 2003 | May | 40 |
| 2002 | Oct | 50 |
| 2002 | May | 75 |
| 2001 | May | 25 |
| 2000 | Apr | 30 |
| 1999 | Jul | 40 |
| 1998 | Jun | 40 |
| 1997 | Jun | 40 |