| Year | Month | Dividend (%) |
|---|---|---|
| 2023 | May | 5 |
| 2022 | May | 40 |
| 2021 | Jun | 40 |
| 2020 | Feb | 40 |
| 2019 | May | 40 |
| 2018 | May | 40 |
| 2017 | May | 25 |
| 2016 | Jul | 15 |
| 2016 | Mar | 20 |
| 2015 | Aug | 10 |
| 2011 | Jun | 27 |
| 2010 | May | 9 |
| 2010 | Apr | 18 |
| 2008 | Aug | 5 |
| 2008 | Mar | 20 |
| 2007 | Jul | 10 |
| 2007 | May | 15 |
| 2006 | Jul | 10 |
| 2002 | Jul | - |
| 1999 | Jul | 10 |
| 1997 | Jul | 15 |