| Year | Month | Dividend (%) |
|---|---|---|
| 2023 | May | 5 |
| 2022 | May | 20 |
| 2021 | Jun | 10 |
| 2019 | May | 10 |
| 2018 | May | 30 |
| 2017 | Aug | 30 |
| 2016 | May | 30 |
| 2015 | May | 30 |
| 2014 | May | 30 |
| 2013 | May | 25 |
| 2012 | May | 20 |
| 2011 | May | 15 |
| 2010 | Jun | 15 |
| 2009 | Jun | 10 |
| 2002 | Sep | - |
| 2001 | Jun | 5 |
| 2000 | Apr | 15 |
| 1999 | May | 5 |
| 1998 | Jul | 20 |
| 1997 | Jul | 5 |