| Year | Month | Dividend (%) |
|---|---|---|
| 2025 | May | 145 |
| 2024 | May | 375 |
| 2023 | May | 170 |
| 2022 | May | 90 |
| 2021 | May | 25 |
| 2020 | Feb | 55 |
| 2019 | May | 80 |
| 2018 | May | 13 |
| 2017 | Jun | 100 |
| 2016 | May | 100 |
| 2015 | Jun | 113 |
| 2014 | May | 145 |
| 2014 | Feb | 15 |
| 2013 | May | 150 |
| 2012 | Jun | 260 |
| 2012 | Jan | 70 |
| 2011 | May | 160 |
| 2011 | Feb | 70 |
| 2010 | May | 150 |
| 2010 | Jan | 50 |
| 2009 | Jun | 125 |
| 2009 | Jan | 50 |
| 2008 | May | 85 |
| 2008 | Jan | 50 |
| 2007 | May | 85 |
| 2007 | Jan | 50 |
| 2006 | Jun | 65 |
| 2006 | Jan | 35 |
| 2005 | Jun | 40 |
| 2005 | Jan | 25 |
| 2004 | Jun | 35 |
| 2004 | Jan | 15 |
| 2003 | Jun | 25 |
| 2002 | Jun | 15 |
| 2001 | May | 7 |
| 2000 | Jun | 10 |
| 1999 | May | 12 |
| 1998 | Jun | 12 |
| 1997 | Jul | 18 |