| Year | Month | Dividend (%) |
|---|---|---|
| 2025 | May | 1,590 |
| 2024 | May | 1,370 |
| 2023 | May | 1,130 |
| 2022 | May | 710 |
| 2021 | May | 400 |
| 2017 | May | 260 |
| 2016 | May | 260 |
| 2015 | May | 350 |
| 2014 | May | 150 |
| 2014 | Mar | 150 |
| 2013 | May | 415 |
| 2012 | May | 350 |
| 2011 | May | 300 |
| 2010 | May | 200 |
| 2010 | Jan | 100 |
| 2009 | May | 290 |
| 2008 | May | 215 |
| 2007 | May | 140 |
| 2006 | May | 140 |
| 2005 | May | 125 |
| 2004 | May | 110 |
| 2003 | Jun | 85 |
| 2002 | May | 60 |
| 2001 | May | 50 |
| 2000 | Jun | 25 |
| 2000 | Feb | 25 |
| 1999 | Jun | 40 |
| 1998 | Jun | 40 |
| 1997 | Jun | 40 |