| Year | Month | Dividend (%) |
|---|---|---|
| 2022 | May | 100 |
| 2021 | May | 75 |
| 2019 | May | 15 |
| 2018 | May | 50 |
| 2017 | May | 100 |
| 2016 | May | 100 |
| 2015 | May | 75 |
| 2014 | May | 75 |
| 2013 | May | 50 |
| 2012 | Jul | 10 |
| 2011 | May | 39 |
| 2011 | Feb | 100 |
| 2010 | May | 30 |
| 2008 | May | 39 |
| 2007 | May | 39 |
| 2006 | Jun | 39 |
| 2005 | May | 39 |
| 2004 | Jun | 32 |
| 2003 | Jun | 23 |
| 2002 | Jun | 23 |
| 2001 | Jun | 23 |
| 2000 | Apr | 15 |
| 1999 | Aug | 20 |
| 1998 | Oct | 30 |