| Year | Month | Dividend (%) |
|---|---|---|
| 2022 | May | 10 |
| 2021 | Jun | 10 |
| 2020 | Jun | 10 |
| 2019 | May | 10 |
| 2018 | Apr | 10 |
| 2017 | Aug | 10 |
| 2016 | May | 10 |
| 2015 | May | 10 |
| 2014 | May | 10 |
| 2013 | May | 10 |
| 2012 | May | 10 |
| 2011 | May | 10 |
| 2010 | May | 10 |
| 2009 | May | 10 |
| 2008 | May | 25 |
| 2007 | May | 25 |
| 2006 | May | 25 |
| 2005 | Jun | 25 |
| 2004 | May | 25 |
| 2003 | Jul | 25 |
| 2002 | Sep | 25 |
| 2001 | Jul | 25 |
| 2000 | Apr | 20 |
| 1999 | Jun | 12 |
| 1998 | Aug | 12 |