| Year | Month | Dividend (%) |
|---|---|---|
| 2016 | May | 7 |
| 2015 | May | 33 |
| 2014 | Apr | 36 |
| 2014 | Jan | 40 |
| 2013 | May | 92 |
| 2012 | Apr | 79 |
| 2011 | Apr | 104 |
| 2010 | Apr | 91 |
| 2009 | Apr | 73 |
| 2008 | Apr | 47 |
| 2007 | Apr | 27 |
| 2007 | Feb | 20 |
| 2006 | Apr | 45 |
| 2005 | May | 30 |
| 2004 | May | 30 |
| 2004 | Jan | 20 |
| 2003 | May | 45 |
| 2002 | May | 35 |
| 2001 | May | 35 |
| 2000 | May | 35 |
| 1999 | Jun | 35 |
| 1998 | May | 30 |
| 1997 | Jun | 25 |