| Year | Month | Dividend (%) |
|---|---|---|
| 2019 | May | 10 |
| 2018 | May | 10 |
| 2017 | Jun | 10 |
| 2016 | May | 10 |
| 2015 | May | 10 |
| 2014 | May | 8 |
| 2013 | May | 5 |
| 2011 | Aug | 10 |
| 2010 | Sep | 15 |
| 2009 | Jul | 25 |
| 2008 | Jun | 25 |
| 2007 | Mar | 25 |
| 2006 | Jun | 25 |
| 2005 | Jun | 25 |
| 2004 | Aug | 25 |
| 2003 | Aug | 25 |
| 2001 | Jul | 20 |
| 2000 | Jul | 10 |
| 2000 | Apr | 15 |
| 1999 | Aug | 10 |
| 1998 | Dec | 15 |
| 1998 | Jun | 10 |
| 1997 | Jun | 25 |