| Year | Month | Dividend (%) |
|---|---|---|
| 2019 | May | 30 |
| 2018 | May | 20 |
| 2016 | May | 30 |
| 2015 | Jun | 30 |
| 2014 | May | 30 |
| 2013 | May | 20 |
| 2010 | May | 30 |
| 2009 | Jun | 50 |
| 2008 | Jun | 75 |
| 2008 | Feb | 75 |
| 2007 | Jun | 90 |
| 2007 | Feb | 60 |
| 2006 | Jun | 90 |
| 2006 | Jan | 60 |
| 2005 | Jun | 80 |
| 2005 | Jan | 40 |
| 2004 | Jun | 120 |
| 2003 | Jun | 100 |
| 2002 | Jun | 75 |
| 2001 | Aug | 25 |
| 2001 | May | 25 |
| 2000 | Aug | 25 |
| 2000 | Apr | 25 |
| 1999 | Aug | 33 |
| 1998 | Aug | 33 |
| 1997 | Aug | 25 |
