| Year | Month | Dividend (%) |
|---|---|---|
| 2019 | May | 115 |
| 2018 | May | 175 |
| 2017 | May | 175 |
| 2016 | Mar | 175 |
| 2015 | May | 175 |
| 2014 | May | 175 |
| 2013 | May | 175 |
| 2012 | May | 175 |
| 2011 | May | 175 |
| 2010 | May | 150 |
| 2009 | May | 125 |
| 2008 | May | 125 |
| 2007 | May | 100 |
| 2006 | May | 83 |
| 2005 | May | 67 |
| 2004 | May | 50 |
| 2003 | May | 33 |
| 2002 | Aug | 10 |
| 2001 | May | 30 |
| 2000 | Mar | 27 |
| 1999 | Aug | - |
| 1998 | Aug | 13 |
| 1997 | Jul | 28 |