| Year | Month | Dividend (%) |
|---|---|---|
| 2025 | May | 22 |
| 2024 | May | 22 |
| 2023 | May | 22 |
| 2022 | Jun | 22 |
| 2021 | Jul | 21 |
| 2020 | Jul | 20 |
| 2019 | May | 20 |
| 2018 | May | 20 |
| 2017 | Aug | 20 |
| 2016 | May | 20 |
| 2015 | Sep | 20 |
| 2014 | Jun | 20 |
| 2013 | May | 18 |
| 2012 | Aug | 15 |
| 2011 | Aug | 20 |
| 2010 | Aug | 18 |
| 2009 | Aug | 15 |
| 2008 | Aug | 14 |
| 2007 | Aug | 14 |
| 2006 | Aug | 14 |
| 2005 | Jul | 12 |
| 2004 | Aug | 10 |
| 2003 | Aug | 8 |
| 2002 | Aug | 7 |
| 2001 | Aug | - |
| 1997 | Sep | 15 |