| Year | Month | Dividend (%) |
|---|---|---|
| 2022 | May | 75 |
| 2021 | Jun | 75 |
| 2020 | Feb | 25 |
| 2019 | Jul | 25 |
| 2019 | May | 70 |
| 2018 | May | 80 |
| 2017 | May | 75 |
| 2016 | Mar | 60 |
| 2015 | May | 50 |
| 2014 | May | 50 |
| 2013 | May | 40 |
| 2012 | May | 240 |
| 2011 | Jul | 40 |
| 2010 | Jul | 20 |
| 2009 | Aug | 20 |
| 2008 | Jul | 15 |
| 2007 | Jul | 15 |
| 2006 | Sep | 15 |
| 2005 | Aug | 10 |