| Year | Month | Dividend (%) |
|---|---|---|
| 2025 | May | 35 |
| 2024 | May | 40 |
| 2023 | May | 15 |
| 2023 | May | 35 |
| 2022 | May | 35 |
| 2021 | Jun | 25 |
| 2020 | Jul | 25 |
| 2019 | May | 25 |
| 2018 | May | 25 |
| 2017 | May | 20 |
| 2011 | Jun | 5 |
| 2010 | Jun | 8 |
| 2009 | Jun | 15 |
| 2007 | Nov | 18 |
| 2006 | May | 18 |
| 2005 | May | 18 |
| 2004 | Jun | 15 |
| 2003 | Jun | 10 |
| 2002 | Jul | 5 |
| 2001 | Jul | - |
| 1999 | Jul | - |
| 1997 | Feb | 15 |