| Year | Month | Dividend (%) |
|---|---|---|
| 2025 | May | 15 |
| 2023 | May | 15 |
| 2022 | May | 25 |
| 2021 | May | 20 |
| 2019 | May | 12 |
| 2018 | May | 15 |
| 2017 | May | 10 |
| 2016 | May | 13 |
| 2015 | May | 13 |
| 2015 | Feb | 7 |
| 2014 | May | 6 |
| 2013 | May | 6 |
| 2012 | May | 5 |
| 2011 | May | 6 |
| 2010 | Oct | 5 |
| 2008 | Jul | 20 |
| 2007 | Mar | 22 |
| 2006 | Jun | 12 |
| 2005 | Oct | 10 |
| 2005 | Apr | 13 |
| 2005 | Jan | 7 |
| 2004 | May | 12 |
| 2002 | May | 6 |
| 2001 | Jun | 5 |
| 1999 | Jul | 7 |
| 1998 | Nov | 10 |
| 1997 | Jul | 10 |