| Frequency | Number of dividends |
| Annually | 0 |
| Semi-annually | 0 |
| Quarterly | 125 |
| Monthly | 0 |
| Irregularly | 0 |
| 'none' | 0 |
Dividend payment timing:
| Month | Number of dividends |
| January | 0 |
| February | 12 |
| March | 20 |
| April | 0 |
| May | 12 |
| June | 19 |
| July | 0 |
| August | 11 |
| September | 20 |
| October | 0 |
| November | 11 |
| December | 20 |
| Status | Number |
| Cancelled | 0 |
| Discontinued | 0 |
| Omitted | 0 |
| Year | Dividends paid | Increase from previous year | CAGR to 2012 from | Bumpiness to 2012 from |
| 1980 | $ 0.07287 | 8.479% | 48 | |
| 1981 | $ 0.07670 | 5.264% | 8.584% | 49 |
| 1982 | $ 0.09013 | 17.501% | 8.299% | 50 |
| 1983 | $ 0.09780 | 8.512% | 8.291% | 51 |
| 1984 | $ 0.10758 | 10.000% | 8.231% | 52 |
| 1985 | $ 0.11395 | 5.924% | 8.317% | 53 |
| 1986 | $ 0.13289 | 16.620% | 8.010% | 54 |
| 1987 | $ 0.15089 | 13.542% | 7.794% | 55 |
| 1988 | $ 0.16667 | 10.458% | 7.685% | 56 |
| 1989 | $ 0.19302 | 15.813% | 7.345% | 58 |
| 1990 | $ 0.21366 | 10.694% | 7.195% | 59 |
| 1991 | $ 0.08546 | DECREASE | 12.347% | 57 |
| 1992 | $ 0.00000 | DECREASE | The dividend for this year was $0.00 | There is no useful bumpiness for this year |
| 1993 | $ 0.03639 | PREVIOUS YEAR's WAS ZERO | 18.959% | 56 |
| 1994 | $ 0.12958 | 256.035% | 11.930% | 13 |
| 1995 | $ 0.20536 | 58.486% | 9.663% | 7 |
| 1996 | $ 0.26588 | 29.469% | 8.531% | 6 |
| 1997 | $ 0.32873 | 23.637% | 7.592% | 4 |
| 1998 | $ 0.37566 | 14.278% | 7.130% | 4 |
| 1999 | $ 0.41994 | 11.786% | 6.780% | 4 |
| 2000 | $ 0.46274 | 10.193% | 6.501% | 4 |
| 2001 | $ 0.52724 | 13.938% | 5.849% | 4 |
| 2002 | $ 0.60280 | 14.331% | 5.036% | 3 |
| 2003 | $ 0.66642 | 10.554% | 4.440% | 2 |
| 2004 | $ 0.73091 | 9.677% | 3.804% | 1 |
| 2005 | $ 0.77771 | 6.404% | 3.438% | 1 |
| 2006 | $ 0.81796 | 5.175% | 3.151% | 1 |
| 2007 | $ 0.84249 | 3.000% | 3.181% | 1 |
| 2008 | $ 0.87925 | 4.363% | 2.888% | 0 |
| 2009 | $ 0.90392 | 2.806% | 2.915% | 0 |
| 2010 | $ 0.93104 | 3.000% | 2.872% | 0 |
| 2011 | $ 0.95898 | 3.000% | 2.744% | 0 |
| 2012 | $ 0.98529 | 2.744% |
| Yield | Price |
| 0.5% | $197.06 |
| 1.0% | $ 98.53 |
| 1.5% | $ 65.69 |
| 2.0% | $ 49.26 |
| 2.5% | $ 39.41 |
| 3.0% | $ 32.84 |
| 3.5% | $ 28.15 |
| 4.0% | $ 24.63 |
| 4.5% | $ 21.90 |
| 5.0% | $ 19.71 |
| 5.5% | $ 17.91 |
| 6.0% | $ 16.42 |
| 6.5% | $ 15.16 |
| 7.0% | $ 14.08 |
| 7.5% | $ 13.14 |
| 8.0% | $ 12.32 |
| 8.5% | $ 11.59 |
| 9.0% | $ 10.95 |
| 9.5% | $ 10.37 |
| 10.0% | $ 9.85 |