| Year | Month | Dividend (%) |
|---|---|---|
| 2024 | May | 100 |
| 2023 | May | 30 |
| 2022 | May | 30 |
| 2019 | Apr | 30 |
| 2018 | Apr | 30 |
| 2017 | May | 13 |
| 2016 | Apr | 30 |
| 2015 | Apr | 30 |
| 2014 | Apr | 20 |
| 2013 | Apr | 10 |
| 2012 | Apr | 25 |
| 2011 | Apr | 10 |
| 2008 | Apr | 25 |
| 2007 | Apr | 50 |
| 2006 | May | 50 |
| 2005 | Apr | 40 |
| 2004 | May | 55 |
| 2003 | Apr | 45 |
| 2002 | Apr | 45 |
| 2001 | Apr | 30 |
| 2000 | Mar | 15 |
| 1999 | May | 20 |
| 1998 | May | 15 |
| 1997 | Jun | 10 |
| 1997 | Feb | - |