| Year | Month | Dividend (%) |
|---|---|---|
| 2025 | May | 100 |
| 2022 | May | 110 |
| 2021 | May | 110 |
| 2020 | Mar | - |
| 2019 | May | 100 |
| 2018 | Feb | 70 |
| 2017 | Mar | 60 |
| 2016 | Mar | 60 |
| 2015 | May | 55 |
| 2014 | May | 50 |
| 2013 | May | 65 |
| 2012 | Aug | 45 |
| 2011 | Aug | 40 |
| 2010 | Sep | 35 |
| 2009 | Sep | 25 |
| 2008 | Jul | 20 |
| 2007 | May | 20 |
| 2005 | Aug | 15 |
| 2002 | Jul | 10 |
| 2001 | Sep | 10 |
| 2000 | Mar | 10 |