| Year | Month | Dividend (%) |
|---|---|---|
| 2022 | May | 30 |
| 2021 | Jun | 30 |
| 2019 | May | 40 |
| 2018 | May | 45 |
| 2017 | May | 45 |
| 2016 | May | 40 |
| 2015 | Feb | 45 |
| 2014 | Feb | 45 |
| 2013 | Feb | 40 |
| 2012 | Mar | 40 |
| 2011 | Feb | 50 |
| 2010 | Feb | 40 |
| 2009 | Mar | 30 |
| 2008 | Feb | 15 |
| 2007 | Mar | 13 |
| 2006 | Feb | 8 |
| 2005 | Feb | 5 |
| 2003 | Feb | 5 |
| 2002 | Feb | 5 |
| 2001 | Mar | 5 |
| 2000 | Mar | 25 |
| 1999 | Feb | 30 |
| 1998 | Feb | 20 |
| 1997 | Mar | 13 |