| Year | Month | Dividend (%) |
|---|---|---|
| 2015 | May | 180 |
| 2014 | May | 180 |
| 2013 | May | 180 |
| 2012 | May | 180 |
| 2011 | May | 180 |
| 2010 | May | 180 |
| 2009 | Jul | 180 |
| 2008 | Jul | 180 |
| 2007 | Jun | 150 |
| 2006 | Apr | 130 |
| 2005 | Jul | 100 |
| 2004 | Jul | 75 |
| 2003 | Jul | 50 |
| 2002 | Jul | 40 |
| 2001 | Aug | 30 |
| 2000 | Jul | 20 |
| 1999 | Jul | 20 |
| 1998 | Jul | 45 |