| Year | Month | Dividend (%) |
|---|---|---|
| 2019 | May | 30 |
| 2018 | May | 20 |
| 2017 | Jun | 30 |
| 2016 | May | 30 |
| 2015 | May | 25 |
| 2014 | May | 15 |
| 2013 | May | 10 |
| 2012 | Aug | 25 |
| 2011 | Aug | 25 |
| 2010 | Jun | 45 |
| 2009 | Aug | 40 |
| 2009 | Mar | 40 |
| 2008 | Jul | 55 |
| 2008 | Jan | 35 |
| 2007 | Jul | 25 |
| 2007 | Feb | 25 |
| 2006 | Jun | 25 |
| 2006 | Jan | 25 |
| 2005 | Jul | 25 |
| 2004 | Dec | 20 |
| 2004 | Jan | 25 |
| 2003 | Mar | 20 |
| 2002 | May | 121 |
| 2001 | Aug | 20 |
| 2000 | Apr | 20 |
| 1999 | Aug | 20 |
| 1998 | Sep | 20 |
| 1997 | Sep | 30 |