| Year | Month | Dividend (%) |
|---|---|---|
| 2025 | May | 506 |
| 2024 | May | 422 |
| 2023 | May | 325 |
| 2022 | May | 231 |
| 2021 | May | 175 |
| 2020 | Jun | 47 |
| 2019 | May | 170 |
| 2018 | May | 150 |
| 2017 | May | 260 |
| 2016 | May | 240 |
| 2015 | May | 240 |
| 2014 | May | 10 |
| 2014 | May | 270 |
| 2013 | May | 260 |
| 2012 | May | 250 |
| 2011 | May | 230 |
| 2010 | May | 190 |
| 2009 | May | 100 |
| 2008 | May | 115 |
| 2007 | May | 40 |
| 2007 | Mar | 75 |
| 2006 | May | 100 |
| 2005 | May | 130 |
| 2004 | May | 90 |
| 2003 | May | 55 |
| 2002 | May | 50 |
| 2001 | Apr | 55 |
| 2000 | Mar | 55 |
| 1999 | May | 55 |
| 1998 | Jun | 55 |
| 1997 | May | 50 |