| Year | Month | Dividend (%) |
|---|---|---|
| 2023 | May | 9 |
| 2022 | May | 25 |
| 2021 | Jun | 15 |
| 2019 | May | 5 |
| 2018 | May | 9 |
| 2017 | May | 9 |
| 2016 | Aug | 9 |
| 2015 | May | 15 |
| 2014 | May | 15 |
| 2013 | Jun | 12 |
| 2011 | May | 9 |
| 2010 | May | 9 |
| 2009 | Jun | 5 |
| 2008 | May | 5 |
| 2007 | May | 12 |
| 2006 | May | 15 |
| 2005 | May | 10 |
| 2004 | Jun | 5 |
| 2003 | Jul | 10 |
| 2002 | May | 9 |
| 2001 | Jun | 13 |
| 2000 | Aug | 12 |
| 1999 | May | 10 |
| 1998 | Jun | 16 |
| 1997 | Jun | 16 |