| Year | Month | Dividend (%) |
|---|---|---|
| 2023 | May | 20 |
| 2022 | May | 20 |
| 2021 | Jun | 20 |
| 2019 | May | 90 |
| 2018 | May | 100 |
| 2017 | Jun | 50 |
| 2016 | May | 35 |
| 2015 | May | 20 |
| 2014 | May | 10 |
| 2013 | May | 10 |
| 2012 | Aug | 40 |
| 2011 | May | 40 |
| 2010 | Sep | 10 |
| 2008 | May | 10 |
| 2007 | Aug | 10 |
| 2006 | Jun | 10 |
| 2006 | Jan | 30 |
| 2005 | Jun | 20 |
| 2005 | Feb | 20 |
| 2004 | Jun | 40 |
| 2004 | Jan | 20 |
| 2003 | Jun | 60 |
| 2002 | May | 50 |
| 2001 | Jul | 40 |
| 2000 | Apr | 30 |
| 1999 | May | 30 |
| 1998 | Jun | 30 |