| Frequency | Number of dividends |
| Annually | 0 |
| Semi-annually | 0 |
| Quarterly | 133 |
| Monthly | 0 |
| Irregularly | 0 |
| 'none' | 0 |
Dividend payment timing:
| Month | Number of dividends |
| January | 0 |
| February | 0 |
| March | 34 |
| April | 0 |
| May | 0 |
| June | 33 |
| July | 0 |
| August | 0 |
| September | 33 |
| October | 0 |
| November | 0 |
| December | 33 |
| Status | Number |
| Cancelled | 0 |
| Discontinued | 0 |
| Omitted | 0 |
| Year | Dividends paid | Increase from previous year | CAGR to 2012 from | Bumpiness to 2012 from |
| 1980 | $ 0.73778 | 2.358% | 2 | |
| 1981 | $ 0.78222 | 6.024% | 2.242% | 2 |
| 1982 | $ 0.82667 | 5.682% | 2.129% | 2 |
| 1983 | $ 0.88889 | 7.527% | 1.948% | 1 |
| 1984 | $ 0.95111 | 7.000% | 1.772% | 1 |
| 1985 | $ 0.97778 | 2.804% | 1.734% | 1 |
| 1986 | $ 1.03111 | 5.455% | 1.594% | 1 |
| 1987 | $ 1.06222 | 3.017% | 1.537% | 1 |
| 1988 | $ 1.08889 | 2.511% | 1.497% | 1 |
| 1989 | $ 1.12000 | 2.857% | 1.438% | 1 |
| 1990 | $ 1.14667 | 2.381% | 1.395% | 1 |
| 1991 | $ 1.16444 | 1.550% | 1.388% | 1 |
| 1992 | $ 1.19333 | 2.481% | 1.334% | 1 |
| 1993 | $ 1.22667 | 2.793% | 1.257% | 1 |
| 1994 | $ 1.24667 | 1.630% | 1.237% | 1 |
| 1995 | $ 1.26000 | 1.070% | 1.247% | 1 |
| 1996 | $ 1.27326 | 1.052% | 1.259% | 1 |
| 1997 | $ 1.28666 | 1.053% | 1.273% | 1 |
| 1998 | $ 1.29827 | 0.902% | 1.299% | 1 |
| 1999 | $ 1.30820 | 0.765% | 1.340% | 1 |
| 2000 | $ 1.31840 | 0.780% | 1.387% | 1 |
| 2001 | $ 1.32790 | 0.721% | 1.448% | 1 |
| 2002 | $ 1.33823 | 0.778% | 1.515% | 1 |
| 2003 | $ 1.34832 | 0.754% | 1.600% | 1 |
| 2004 | $ 1.35997 | 0.864% | 1.693% | 1 |
| 2005 | $ 1.37334 | 0.983% | 1.794% | 0 |
| 2006 | $ 1.38663 | 0.968% | 1.933% | 0 |
| 2007 | $ 1.40660 | 1.440% | 2.032% | 0 |
| 2008 | $ 1.43340 | 1.905% | 2.063% | 0 |
| 2009 | $ 1.46020 | 1.870% | 2.128% | 0 |
| 2010 | $ 1.48700 | 1.835% | 2.274% | 0 |
| 2011 | $ 1.51540 | 1.910% | 2.640% | 0 |
| 2012 | $ 1.55540 | 2.640% |
| Yield | Price |
| 0.5% | $311.08 |
| 1.0% | $155.54 |
| 1.5% | $103.69 |
| 2.0% | $ 77.77 |
| 2.5% | $ 62.22 |
| 3.0% | $ 51.85 |
| 3.5% | $ 44.44 |
| 4.0% | $ 38.88 |
| 4.5% | $ 34.56 |
| 5.0% | $ 31.11 |
| 5.5% | $ 28.28 |
| 6.0% | $ 25.92 |
| 6.5% | $ 23.93 |
| 7.0% | $ 22.22 |
| 7.5% | $ 20.74 |
| 8.0% | $ 19.44 |
| 8.5% | $ 18.30 |
| 9.0% | $ 17.28 |
| 9.5% | $ 16.37 |
| 10.0% | $ 15.55 |