| Year | Month | Dividend (%) |
|---|---|---|
| 2012 | Apr | 20 |
| 2011 | Jun | 20 |
| 2011 | Feb | 20 |
| 2010 | May | 15 |
| 2010 | Apr | 25 |
| 2009 | May | 25 |
| 2009 | Jan | 25 |
| 2008 | Jun | 25 |
| 2008 | Jan | 25 |
| 2007 | Jun | 25 |
| 2007 | Jan | 25 |
| 2006 | Jun | 25 |
| 2006 | Jan | 25 |
| 2005 | Jun | 20 |
| 2005 | Jan | 25 |
| 2004 | Jun | 25 |
| 2004 | Jan | 25 |
| 2003 | Jul | 20 |
| 2003 | Mar | 20 |
| 2002 | Jul | 25 |
| 2001 | Nov | 20 |
| 2001 | Jul | 15 |
| 2001 | Feb | 10 |
| 2000 | Apr | 25 |
| 2000 | Jan | 10 |
| 1999 | Jul | 25 |
| 1999 | Jan | 10 |
| 1998 | Jul | 25 |
| 1998 | Jan | 35 |