| Year | Month | Dividend (%) |
|---|---|---|
| 2019 | May | 10 |
| 2018 | May | 10 |
| 2017 | Jun | 10 |
| 2016 | May | 10 |
| 2015 | May | 25 |
| 2015 | Mar | 6 |
| 2014 | May | 45 |
| 2013 | May | 20 |
| 2013 | Feb | 15 |
| 2012 | May | 20 |
| 2012 | Feb | 10 |
| 2011 | Jun | 50 |
| 2010 | Jul | 70 |
| 2009 | Jun | 65 |
| 2008 | Jun | 65 |
| 2007 | Jul | 10 |
| 2007 | Mar | 50 |
| 2006 | Jul | 50 |
| 2005 | Jun | 70 |
| 2004 | Jun | 70 |
| 2003 | Jul | 50 |
| 2002 | Jul | 50 |
| 2001 | Jun | 50 |
| 2000 | Jul | 50 |
| 1999 | Jun | 50 |
| 1998 | Jun | 50 |
| 1997 | Jun | 30 |