| Year | Month | Dividend (%) |
|---|---|---|
| 2025 | May | 40 |
| 2024 | May | 30 |
| 2023 | May | 30 |
| 2022 | May | 15 |
| 2021 | Jun | 10 |
| 2020 | Jun | 20 |
| 2019 | May | 20 |
| 2018 | May | 15 |
| 2011 | May | 20 |
| 2010 | May | 25 |
| 2009 | May | 10 |
| 2008 | May | 24 |
| 2007 | May | 24 |
| 2006 | May | 20 |
| 2005 | May | 10 |
| 2001 | Apr | 10 |
| 2000 | Mar | 10 |
| 1999 | May | 10 |
| 1997 | May | 20 |