| Year | Month | Dividend (%) |
|---|---|---|
| 2025 | May | 200 |
| 2024 | May | 150 |
| 2023 | May | 80 |
| 2022 | May | 60 |
| 2021 | May | 50 |
| 2021 | May | 50 |
| 2020 | May | 30 |
| 2019 | May | 20 |
| 2019 | Apr | 30 |
| 2018 | May | 30 |
| 2017 | May | 10 |
| 2016 | May | 10 |
| 2015 | May | 40 |
| 2014 | Apr | 40 |
| 2013 | Apr | 40 |
| 2012 | Apr | 40 |
| 2011 | Apr | 80 |
| 2010 | Apr | 80 |
| 2009 | Apr | 70 |
| 2008 | Apr | 70 |
| 2007 | Jun | 70 |
| 2006 | May | 70 |
| 2005 | May | 60 |
| 2004 | Jun | 60 |
| 2003 | May | 50 |
| 2002 | Jun | 50 |
| 2001 | Jun | 50 |
| 2000 | Mar | 40 |
| 1999 | Jun | 35 |
| 1998 | Jun | 35 |
| 1997 | Jun | 30 |