| Year | Month | Dividend (%) |
|---|---|---|
| 2025 | May | 85 |
| 2024 | May | 85 |
| 2023 | May | 75 |
| 2022 | May | 65 |
| 2021 | Jun | 60 |
| 2020 | Jun | 75 |
| 2019 | May | 110 |
| 2018 | May | 100 |
| 2017 | Jun | 70 |
| 2016 | May | 200 |
| 2015 | May | 180 |
| 2014 | May | 180 |
| 2013 | May | 176 |
| 2012 | May | 280 |
| 2011 | May | 260 |
| 2010 | Jul | 230 |
| 2009 | Jun | 200 |
| 2008 | Jun | 170 |
| 2007 | Jun | 135 |
| 2006 | Jun | 90 |
| 2005 | May | 55 |
| 2004 | May | 35 |
| 2003 | May | 31 |
| 2002 | May | 18 |
| 2001 | May | 15 |
| 2000 | Aug | 10 |
| 2000 | Apr | 15 |
| 1999 | Aug | 30 |
| 1998 | Jul | 32 |