| Frequency | Number of dividends |
| Annually | 0 |
| Semi-annually | 0 |
| Quarterly | 129 |
| Monthly | 0 |
| Irregularly | 0 |
| 'none' | 0 |
Dividend payment timing:
| Month | Number of dividends |
| January | 0 |
| February | 1 |
| March | 32 |
| April | 0 |
| May | 1 |
| June | 31 |
| July | 0 |
| August | 0 |
| September | 32 |
| October | 0 |
| November | 0 |
| December | 32 |
| Status | Number |
| Cancelled | 0 |
| Discontinued | 0 |
| Omitted | 0 |
| Year | Dividends paid | Increase from previous year | CAGR to 2012 from | Bumpiness to 2012 from |
| 1980 | $ 0.21333 | 6.240% | 5 | |
| 1981 | $ 0.23444 | 9.896% | 6.124% | 5 |
| 1982 | $ 0.26000 | 10.901% | 5.968% | 5 |
| 1983 | $ 0.29334 | 12.821% | 5.740% | 5 |
| 1984 | $ 0.37333 | 27.272% | 5.042% | 3 |
| 1985 | $ 0.00000 | DECREASE | The dividend for this year was $0.00 | There is no useful bumpiness for this year |
| 1986 | $ 0.50667 | PREVIOUS YEAR's WAS ZERO | 4.209% | 3 |
| 1987 | $ 0.55111 | 8.771% | 4.031% | 3 |
| 1988 | $ 0.62222 | 12.904% | 3.676% | 2 |
| 1989 | $ 0.67556 | 8.571% | 3.469% | 2 |
| 1990 | $ 0.72889 | 7.895% | 3.272% | 1 |
| 1991 | $ 0.78222 | 7.317% | 3.083% | 1 |
| 1992 | $ 0.82667 | 5.682% | 2.955% | 1 |
| 1993 | $ 0.85333 | 3.225% | 2.941% | 1 |
| 1994 | $ 0.88000 | 3.125% | 2.930% | 1 |
| 1995 | $ 0.89333 | 1.515% | 3.014% | 1 |
| 1996 | $ 0.92000 | 2.985% | 3.016% | 1 |
| 1997 | $ 0.94667 | 2.899% | 3.024% | 1 |
| 1998 | $ 1.00000 | 5.634% | 2.840% | 1 |
| 1999 | $ 1.04000 | 4.000% | 2.751% | 1 |
| 2000 | $ 1.08000 | 3.846% | 2.660% | 1 |
| 2001 | $ 1.12000 | 3.704% | 2.566% | 1 |
| 2002 | $ 1.16000 | 3.571% | 2.466% | 1 |
| 2003 | $ 1.20000 | 3.448% | 2.358% | 1 |
| 2004 | $ 1.24000 | 3.333% | 2.236% | 1 |
| 2005 | $ 1.28000 | 3.226% | 2.096% | 1 |
| 2006 | $ 1.32000 | 3.125% | 1.925% | 1 |
| 2007 | $ 1.37000 | 3.788% | 1.557% | 0 |
| 2008 | $ 1.40000 | 2.190% | 1.399% | 0 |
| 2009 | $ 1.42000 | 1.429% | 1.389% | 0 |
| 2010 | $ 1.44000 | 1.408% | 1.379% | 0 |
| 2011 | $ 1.46000 | 1.389% | 1.370% | 0 |
| 2012 | $ 1.48000 | 1.370% |
| Yield | Price |
| 0.5% | $296.00 |
| 1.0% | $148.00 |
| 1.5% | $ 98.67 |
| 2.0% | $ 74.00 |
| 2.5% | $ 59.20 |
| 3.0% | $ 49.33 |
| 3.5% | $ 42.29 |
| 4.0% | $ 37.00 |
| 4.5% | $ 32.89 |
| 5.0% | $ 29.60 |
| 5.5% | $ 26.91 |
| 6.0% | $ 24.67 |
| 6.5% | $ 22.77 |
| 7.0% | $ 21.14 |
| 7.5% | $ 19.73 |
| 8.0% | $ 18.50 |
| 8.5% | $ 17.41 |
| 9.0% | $ 16.44 |
| 9.5% | $ 15.58 |
| 10.0% | $ 14.80 |