| Year | Month | Dividend (%) |
|---|---|---|
| 2025 | May | 25 |
| 2024 | May | 10 |
| 2023 | May | 10 |
| 2021 | May | 15 |
| 2020 | Jun | 12 |
| 2019 | May | 49 |
| 2018 | May | 60 |
| 2017 | May | 66 |
| 2016 | May | 15 |
| 2016 | Mar | 40 |
| 2015 | May | 44 |
| 2014 | May | 20 |
| 2014 | Feb | 10 |
| 2008 | Jul | 15 |
| 2007 | Jul | 15 |
| 2006 | Jun | 15 |
| 2005 | May | 15 |
| 2004 | May | 12 |
| 2003 | Apr | 18 |
| 2002 | Apr | 27 |
| 2001 | May | 20 |
| 2000 | May | 15 |
| 1999 | May | - |