| Year | Month | Dividend (%) |
|---|---|---|
| 2023 | May | 2,200 |
| 2022 | May | 1,500 |
| 2021 | May | 1,150 |
| 2020 | May | 1,050 |
| 2019 | May | 875 |
| 2019 | Mar | 175 |
| 2018 | Apr | 825 |
| 2018 | Mar | 175 |
| 2017 | May | 750 |
| 2017 | Mar | 150 |
| 2016 | May | 700 |
| 2016 | Mar | 150 |
| 2015 | Apr | 650 |
| 2015 | Mar | 100 |
| 2014 | May | 700 |
| 2013 | May | 625 |
| 2012 | May | 550 |
| 2011 | May | 450 |
| 2010 | May | 360 |
| 2009 | May | 300 |
| 2008 | Apr | 250 |
| 2007 | May | 220 |
| 2006 | May | 200 |
| 2005 | May | 170 |
| 2004 | May | 135 |
| 2003 | May | 110 |
| 2002 | Jan | 250 |
| 2001 | May | 125 |
| 2000 | Apr | 90 |
| 2000 | Jan | 100 |
| 1999 | Jun | 85 |
| 1998 | May | - |
| 1997 | Apr | 45 |