| Year | Month | Dividend (%) |
|---|---|---|
| 2019 | May | 12 |
| 2018 | May | 15 |
| 2017 | May | 15 |
| 2016 | May | 15 |
| 2015 | May | 6 |
| 2014 | May | 25 |
| 2013 | May | 25 |
| 2012 | May | 20 |
| 2011 | Jun | 20 |
| 2010 | Jun | 20 |
| 2009 | Jun | 25 |
| 2008 | Jun | 10 |
| 2007 | Oct | 10 |
| 2007 | May | 12 |
| 2006 | Jun | 12 |
| 2005 | Jun | 10 |
| 2004 | Jun | 10 |
| 2003 | Jul | 10 |
| 2002 | Jul | 10 |
| 2001 | Jun | 10 |
| 2000 | Apr | 10 |