| Year | Month | Dividend (%) |
|---|---|---|
| 2025 | Apr | 50 |
| 2024 | Jul | 85 |
| 2023 | May | 80 |
| 2022 | May | 80 |
| 2021 | May | 80 |
| 2020 | Feb | 75 |
| 2019 | May | 55 |
| 2018 | May | 50 |
| 2017 | May | 50 |
| 2016 | Mar | 25 |
| 2016 | Mar | 115 |
| 2015 | May | 110 |
| 2014 | May | 100 |
| 2013 | May | 70 |
| 2012 | May | 70 |
| 2011 | May | 70 |
| 2010 | May | 60 |
| 2009 | May | 70 |
| 2008 | May | 70 |
| 2007 | Jul | 65 |
| 2006 | Jun | 65 |
| 2005 | Jun | 45 |
| 2004 | May | 45 |
| 2003 | Jun | 36 |
| 2002 | Jun | 30 |
| 2001 | May | 25 |
| 2000 | Mar | 21 |
| 1999 | Jul | 18 |
| 1997 | Jul | 10 |