| Year | Month | Dividend (%) |
|---|---|---|
| 2022 | May | 40 |
| 2021 | Jun | 15 |
| 2019 | May | 6 |
| 2018 | May | 35 |
| 2017 | May | 30 |
| 2016 | May | 30 |
| 2015 | May | 60 |
| 2014 | May | 25 |
| 2013 | May | 20 |
| 2012 | Aug | 15 |
| 2011 | Jul | 10 |
| 2010 | Jul | 20 |
| 2007 | Aug | 10 |
| 2006 | Aug | 9 |
| 2005 | Aug | 6 |
| 2003 | Aug | 6 |
| 2002 | Jul | 8 |
| 2001 | Jul | 6 |
| 2000 | Aug | 6 |
| 1999 | Aug | 8 |
| 1998 | Jul | 14 |