| Year | Month | Dividend (%) |
|---|---|---|
| 2017 | May | 5 |
| 2016 | May | 10 |
| 2015 | Jun | 20 |
| 2014 | May | 10 |
| 2010 | May | 20 |
| 2009 | May | 50 |
| 2008 | May | 110 |
| 2007 | Jul | 100 |
| 2006 | Jun | 30 |
| 2005 | Oct | 150 |
| 2005 | May | 100 |
| 2005 | Jan | 100 |
| 2004 | May | 50 |
| 2003 | Jul | 22 |
| 2002 | May | 20 |
| 2001 | Jun | 16 |
| 2000 | Aug | - |
| 1999 | Sep | 15 |
| 1998 | Aug | 15 |
| 1997 | Aug | 15 |