| Year | Month | Dividend (%) |
|---|---|---|
| 2025 | May | 10 |
| 2019 | May | 7 |
| 2018 | May | 10 |
| 2017 | May | 10 |
| 2016 | May | 20 |
| 2015 | May | 20 |
| 2014 | May | 40 |
| 2013 | May | 80 |
| 2012 | May | 60 |
| 2011 | Aug | 60 |
| 2010 | Apr | 60 |
| 2009 | May | 30 |
| 2008 | Apr | 25 |
| 2007 | Apr | 25 |
| 2006 | May | 25 |
| 2005 | Apr | 20 |
| 2004 | Apr | 18 |
| 2003 | Apr | 15 |
| 2002 | Apr | 15 |
| 2001 | Apr | 30 |
| 2000 | May | - |
| 2000 | Mar | 40 |
| 1999 | Apr | 40 |
| 1998 | May | 60 |
| 1997 | May | 50 |