| Year | Month | Dividend (%) |
|---|---|---|
| 2024 | May | 25 |
| 2023 | May | 25 |
| 2019 | May | 25 |
| 2018 | May | 20 |
| 2017 | May | 20 |
| 2015 | May | 20 |
| 2014 | Apr | 50 |
| 2013 | May | 50 |
| 2012 | May | 40 |
| 2011 | May | 20 |
| 2010 | May | 20 |
| 2009 | Apr | 20 |
| 2008 | May | 20 |
| 2007 | May | 20 |
| 2006 | Jun | 20 |
| 2005 | Jul | 12 |
| 2004 | Jul | 10 |
| 2003 | Jul | 10 |
| 2002 | Jun | 20 |
| 2001 | Jul | 25 |
| 1999 | Jul | 20 |
| 1998 | Jul | 15 |
| 1997 | Aug | 15 |