| Year | Month | Dividend (%) |
|---|---|---|
| 2013 | May | 20 |
| 2012 | Jun | 20 |
| 2011 | Jun | 30 |
| 2010 | Jul | 23 |
| 2010 | Jan | 25 |
| 2009 | Jul | 23 |
| 2009 | Jan | 25 |
| 2008 | Aug | 30 |
| 2008 | Jan | 35 |
| 2007 | Aug | 40 |
| 2007 | Jan | 20 |
| 2006 | Jul | 35 |
| 2005 | Oct | 15 |
| 2005 | Aug | 15 |
| 2004 | Oct | 15 |
| 2004 | Jul | 5 |
| 2004 | Jan | 20 |
| 2003 | Jul | 20 |
| 2002 | May | 147 |
| 2001 | Sep | 20 |
| 2000 | Apr | 20 |
| 1999 | Aug | 20 |
| 1998 | Aug | 30 |
| 1997 | Oct | 30 |