| Year | Month | Dividend (%) |
|---|---|---|
| 2022 | May | 50 |
| 2021 | May | 35 |
| 2020 | May | 35 |
| 2019 | May | 35 |
| 2018 | May | 30 |
| 2017 | May | 15 |
| 2016 | May | 10 |
| 2015 | May | 10 |
| 2014 | May | 10 |
| 2013 | May | 10 |
| 2012 | May | 20 |
| 2011 | May | 20 |
| 2010 | May | 20 |
| 2009 | May | 20 |
| 2008 | May | 20 |
| 2007 | May | 10 |
| 2003 | Jun | 5 |
| 2002 | Jun | 12 |
| 2001 | Jun | 20 |
| 2000 | May | 40 |
| 1999 | Jul | 35 |
| 1998 | Jun | 35 |
| 1997 | Jul | 22 |