| Frequency | Number of dividends |
| Annually | 0 |
| Semi-annually | 0 |
| Quarterly | 47 |
| Monthly | 0 |
| Irregularly | 0 |
| 'none' | 1 |
Current frequency is quarterly.
Dividend payment timing:
| Month | Number of dividends |
| January | 0 |
| February | 12 |
| March | 0 |
| April | 0 |
| May | 12 |
| June | 0 |
| July | 0 |
| August | 12 |
| September | 0 |
| October | 0 |
| November | 12 |
| December | 0 |
| Status | Number |
| Cancelled | 0 |
| Discontinued | 0 |
| Omitted | 0 |
| Year | Dividends paid | Increase from previous year | CAGR to 2012 from | Bumpiness to 2012 from |
| 2001 | $ 0.35800 | 15.719% | 21 | |
| 2002 | $ 0.64438 | 79.993% | 10.718% | 5 |
| 2003 | $ 0.76625 | 18.914% | 9.843% | 5 |
| 2004 | $ 0.86000 | 12.235% | 9.548% | 5 |
| 2005 | $ 0.98250 | 14.244% | 8.893% | 5 |
| 2006 | $ 1.14250 | 16.285% | 7.708% | 4 |
| 2007 | $ 1.24625 | 9.081% | 7.435% | 4 |
| 2008 | $ 1.36000 | 9.127% | 7.016% | 5 |
| 2009 | $ 1.42000 | 4.412% | 7.898% | 5 |
| 2010 | $ 1.45375 | 2.377% | 10.770% | 4 |
| 2011 | $ 1.55625 | 7.051% | 14.618% | 0 |
| 2012 | $ 1.78375 | 14.618% |
| Yield | Price |
| 0.5% | $356.75 |
| 1.0% | $178.38 |
| 1.5% | $118.92 |
| 2.0% | $ 89.19 |
| 2.5% | $ 71.35 |
| 3.0% | $ 59.46 |
| 3.5% | $ 50.96 |
| 4.0% | $ 44.59 |
| 4.5% | $ 39.64 |
| 5.0% | $ 35.67 |
| 5.5% | $ 32.43 |
| 6.0% | $ 29.73 |
| 6.5% | $ 27.44 |
| 7.0% | $ 25.48 |
| 7.5% | $ 23.78 |
| 8.0% | $ 22.30 |
| 8.5% | $ 20.99 |
| 9.0% | $ 19.82 |
| 9.5% | $ 18.78 |
| 10.0% | $ 17.84 |