| Frequency | Number of dividends |
| Annually | 0 |
| Semi-annually | 0 |
| Quarterly | 144 |
| Monthly | 0 |
| Irregularly | 0 |
| 'none' | 0 |
Dividend payment timing:
| Month | Number of dividends |
| January | 0 |
| February | 0 |
| March | 33 |
| April | 3 |
| May | 0 |
| June | 34 |
| July | 2 |
| August | 0 |
| September | 34 |
| October | 2 |
| November | 0 |
| December | 36 |
| Status | Number |
| Cancelled | 0 |
| Discontinued | 0 |
| Omitted | 0 |
| Year | Dividends paid | Increase from previous year | CAGR to 2012 from | Bumpiness to 2012 from |
| 1977 | $ 0.13444 | 7.694% | 5 | |
| 1978 | $ 0.15500 | 15.290% | 7.479% | 5 |
| 1979 | $ 0.19333 | 24.732% | 6.995% | 5 |
| 1980 | $ 0.22167 | 14.655% | 6.764% | 4 |
| 1981 | $ 0.24000 | 8.270% | 6.716% | 5 |
| 1982 | $ 0.25333 | 5.555% | 6.754% | 5 |
| 1983 | $ 0.26000 | 2.632% | 6.900% | 5 |
| 1984 | $ 0.30000 | 15.385% | 6.608% | 4 |
| 1985 | $ 0.33333 | 11.111% | 6.445% | 4 |
| 1986 | $ 0.36333 | 9.000% | 6.348% | 4 |
| 1987 | $ 0.41000 | 12.844% | 6.096% | 4 |
| 1988 | $ 0.46000 | 12.195% | 5.849% | 4 |
| 1989 | $ 0.51000 | 10.870% | 5.636% | 4 |
| 1990 | $ 0.57000 | 11.765% | 5.366% | 4 |
| 1991 | $ 0.61000 | 7.018% | 5.288% | 4 |
| 1992 | $ 0.64000 | 4.918% | 5.306% | 4 |
| 1993 | $ 0.67000 | 4.688% | 5.339% | 4 |
| 1994 | $ 0.69000 | 2.985% | 5.471% | 4 |
| 1995 | $ 0.71000 | 2.899% | 5.625% | 5 |
| 1996 | $ 0.73000 | 2.817% | 5.803% | 5 |
| 1997 | $ 0.77000 | 5.479% | 5.824% | 5 |
| 1998 | $ 0.83000 | 7.792% | 5.685% | 5 |
| 1999 | $ 0.87000 | 4.819% | 5.752% | 5 |
| 2000 | $ 0.90000 | 3.448% | 5.946% | 5 |
| 2001 | $ 0.94000 | 4.444% | 6.084% | 5 |
| 2002 | $ 0.99000 | 5.319% | 6.161% | 6 |
| 2003 | $ 1.03000 | 4.040% | 6.399% | 6 |
| 2004 | $ 1.08000 | 4.854% | 6.594% | 6 |
| 2005 | $ 1.14000 | 5.556% | 6.743% | 7 |
| 2006 | $ 1.18000 | 3.509% | 7.291% | 7 |
| 2007 | $ 1.22000 | 3.390% | 8.089% | 7 |
| 2008 | $ 1.26000 | 3.279% | 9.327% | 8 |
| 2009 | $ 1.30000 | 3.175% | 11.458% | 8 |
| 2010 | $ 1.34000 | 3.077% | 15.900% | 6 |
| 2011 | $ 1.64000 | 22.388% | 9.756% | 0 |
| 2012 | $ 1.80000 | 9.756% |
| Yield | Price |
| 0.5% | $360.00 |
| 1.0% | $180.00 |
| 1.5% | $120.00 |
| 2.0% | $ 90.00 |
| 2.5% | $ 72.00 |
| 3.0% | $ 60.00 |
| 3.5% | $ 51.43 |
| 4.0% | $ 45.00 |
| 4.5% | $ 40.00 |
| 5.0% | $ 36.00 |
| 5.5% | $ 32.73 |
| 6.0% | $ 30.00 |
| 6.5% | $ 27.69 |
| 7.0% | $ 25.71 |
| 7.5% | $ 24.00 |
| 8.0% | $ 22.50 |
| 8.5% | $ 21.18 |
| 9.0% | $ 20.00 |
| 9.5% | $ 18.95 |
| 10.0% | $ 18.00 |