| Frequency | Number of dividends |
| Annually | 0 |
| Semi-annually | 0 |
| Quarterly | 124 |
| Monthly | 0 |
| Irregularly | 0 |
| 'none' | 0 |
Dividend payment timing:
| Month | Number of dividends |
| January | 0 |
| February | 0 |
| March | 31 |
| April | 0 |
| May | 0 |
| June | 31 |
| July | 0 |
| August | 0 |
| September | 31 |
| October | 0 |
| November | 0 |
| December | 31 |
| Status | Number |
| Cancelled | 0 |
| Discontinued | 0 |
| Omitted | 0 |
| Year | Dividends paid | Increase from previous year | CAGR to 2012 from | Bumpiness to 2012 from |
| 1982 | $ 0.50000 | 1.176% | 1 | |
| 1983 | $ 0.50000 | NO CHANGE | 1.217% | 1 |
| 1984 | $ 0.51000 | 2.000% | 1.189% | 1 |
| 1985 | $ 0.52000 | 1.961% | 1.160% | 1 |
| 1986 | $ 0.52000 | NO CHANGE | 1.205% | 1 |
| 1987 | $ 0.52000 | NO CHANGE | 1.254% | 1 |
| 1988 | $ 0.52500 | 0.962% | 1.266% | 1 |
| 1989 | $ 0.54000 | 2.857% | 1.197% | 1 |
| 1990 | $ 0.54000 | NO CHANGE | 1.252% | 1 |
| 1991 | $ 0.54000 | NO CHANGE | 1.312% | 1 |
| 1992 | $ 0.54000 | NO CHANGE | 1.378% | 1 |
| 1993 | $ 0.54750 | 1.389% | 1.377% | 1 |
| 1994 | $ 0.55750 | 1.826% | 1.352% | 1 |
| 1995 | $ 0.56000 | 0.448% | 1.406% | 1 |
| 1996 | $ 0.56500 | 0.893% | 1.438% | 1 |
| 1997 | $ 0.57000 | 0.885% | 1.475% | 1 |
| 1998 | $ 0.57000 | NO CHANGE | 1.581% | 1 |
| 1999 | $ 0.57000 | NO CHANGE | 1.704% | 1 |
| 2000 | $ 0.57000 | NO CHANGE | 1.847% | 1 |
| 2001 | $ 0.57500 | 0.877% | 1.936% | 1 |
| 2002 | $ 0.58500 | 1.739% | 1.955% | 1 |
| 2003 | $ 0.59000 | 0.855% | 2.078% | 1 |
| 2004 | $ 0.59000 | NO CHANGE | 2.341% | 1 |
| 2005 | $ 0.59500 | 0.847% | 2.556% | 1 |
| 2006 | $ 0.60500 | 1.681% | 2.703% | 1 |
| 2007 | $ 0.61500 | 1.653% | 2.915% | 1 |
| 2008 | $ 0.63000 | 2.439% | 3.034% | 0 |
| 2009 | $ 0.64500 | 2.381% | 3.252% | 0 |
| 2010 | $ 0.66500 | 3.101% | 3.328% | 0 |
| 2011 | $ 0.69000 | 3.759% | 2.899% | 0 |
| 2012 | $ 0.71000 | 2.899% |
| Yield | Price |
| 0.5% | $142.00 |
| 1.0% | $ 71.00 |
| 1.5% | $ 47.33 |
| 2.0% | $ 35.50 |
| 2.5% | $ 28.40 |
| 3.0% | $ 23.67 |
| 3.5% | $ 20.29 |
| 4.0% | $ 17.75 |
| 4.5% | $ 15.78 |
| 5.0% | $ 14.20 |
| 5.5% | $ 12.91 |
| 6.0% | $ 11.83 |
| 6.5% | $ 10.92 |
| 7.0% | $ 10.14 |
| 7.5% | $ 9.47 |
| 8.0% | $ 8.88 |
| 8.5% | $ 8.35 |
| 9.0% | $ 7.89 |
| 9.5% | $ 7.47 |
| 10.0% | $ 7.10 |