| Year | Month | Dividend (%) |
|---|---|---|
| 2025 | May | 8 |
| 2024 | May | 10 |
| 2023 | May | 15 |
| 2022 | May | 12 |
| 2018 | May | 10 |
| 2017 | May | 12 |
| 2016 | May | 12 |
| 2015 | May | 12 |
| 2014 | Apr | 10 |
| 2011 | Apr | 8 |
| 2011 | Feb | 8 |
| 2010 | Apr | 8 |
| 2007 | May | 5 |
| 2006 | May | 10 |
| 2005 | May | 8 |
| 2004 | Apr | 8 |
| 2003 | Apr | 8 |
| 2002 | May | 10 |
| 2001 | May | 18 |
| 2000 | Mar | 18 |
| 1999 | May | 15 |
| 1998 | May | 10 |
| 1997 | Jun | 10 |