| Year | Month | Dividend (%) |
|---|---|---|
| 2013 | Apr | 10 |
| 2012 | Apr | 10 |
| 2011 | Apr | 33 |
| 2010 | Nov | 23 |
| 2010 | Apr | 33 |
| 2009 | Nov | 23 |
| 2009 | May | 33 |
| 2008 | Nov | 23 |
| 2008 | May | 55 |
| 2007 | Mar | 40 |
| 2006 | May | 30 |
| 2005 | Apr | 25 |
| 2004 | May | 25 |
| 2003 | May | 20 |
| 2002 | Apr | 20 |
| 2001 | Apr | 20 |
| 2000 | Mar | 10 |
| 1999 | May | 15 |
| 1998 | Apr | 20 |
| 1997 | Apr | 20 |