| Year | Month | Dividend (%) |
|---|---|---|
| 2016 | Apr | 60 |
| 2015 | Apr | 10 |
| 2015 | Mar | 50 |
| 2014 | Apr | 30 |
| 2013 | Mar | 115 |
| 2012 | Mar | 100 |
| 2011 | Apr | 100 |
| 2010 | Apr | 100 |
| 2009 | Apr | 100 |
| 2008 | Apr | 100 |
| 2007 | Apr | 100 |
| 2006 | Apr | 90 |
| 2005 | Apr | 75 |
| 2004 | Apr | 60 |
| 2003 | Apr | 40 |
| 2002 | May | 25 |
| 2001 | Feb | 25 |
| 2000 | Mar | 23 |
| 1999 | May | 22 |
| 1998 | Jan | 22 |