| Year | Month | Dividend (%) |
|---|---|---|
| 2022 | May | 3 |
| 2021 | Jun | 5 |
| 2019 | May | 3 |
| 2018 | May | 3 |
| 2017 | May | 10 |
| 2016 | May | 10 |
| 2015 | May | 15 |
| 2014 | May | 15 |
| 2013 | May | 10 |
| 2012 | Aug | 10 |
| 2011 | Aug | 10 |
| 2010 | Aug | 10 |
| 2009 | Aug | 10 |
| 2008 | Aug | 10 |
| 2007 | Jun | 20 |
| 2006 | Jul | 10 |
| 2005 | Nov | 30 |
| 2004 | Jul | 20 |
| 2003 | Jul | 20 |
| 2002 | Aug | 20 |
| 2000 | May | 20 |
| 1999 | Jun | 20 |