| Year | Month | Dividend (%) |
|---|---|---|
| 2019 | May | 40 |
| 2018 | May | 45 |
| 2017 | May | 40 |
| 2016 | Apr | 50 |
| 2015 | Apr | 40 |
| 2014 | Dec | 30 |
| 2014 | May | 35 |
| 2013 | Jul | 30 |
| 2012 | Aug | 25 |
| 2012 | Jun | 30 |
| 2011 | Nov | 25 |
| 2010 | Oct | 20 |
| 2008 | Aug | 40 |
| 2007 | Aug | 40 |
| 2006 | Aug | 35 |
| 2005 | Aug | 30 |
| 2004 | Aug | 27 |
| 2003 | Aug | 25 |
| 2002 | Aug | 25 |
| 2001 | Aug | 40 |
| 2000 | Aug | 40 |