| 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 | $ 0.12833 | 4.712% | 2 | |
| 1981 | $ 0.13333 | 3.896% | 4.738% | 2 |
| 1982 | $ 0.13333 | NO CHANGE | 4.900% | 2 |
| 1983 | $ 0.14333 | 7.502% | 4.811% | 2 |
| 1984 | $ 0.15000 | 4.651% | 4.817% | 2 |
| 1985 | $ 0.16833 | 12.221% | 4.552% | 2 |
| 1986 | $ 0.17667 | 4.951% | 4.537% | 2 |
| 1987 | $ 0.18500 | 4.717% | 4.530% | 2 |
| 1988 | $ 0.19833 | 7.208% | 4.420% | 2 |
| 1989 | $ 0.21417 | 7.983% | 4.268% | 2 |
| 1990 | $ 0.22750 | 6.226% | 4.179% | 2 |
| 1991 | $ 0.24250 | 6.593% | 4.066% | 2 |
| 1992 | $ 0.25500 | 5.155% | 4.012% | 2 |
| 1993 | $ 0.26500 | 3.922% | 4.016% | 2 |
| 1994 | $ 0.27500 | 3.774% | 4.030% | 2 |
| 1995 | $ 0.28500 | 3.636% | 4.053% | 2 |
| 1996 | $ 0.29500 | 3.509% | 4.087% | 2 |
| 1997 | $ 0.30500 | 3.390% | 4.134% | 2 |
| 1998 | $ 0.31500 | 3.279% | 4.195% | 2 |
| 1999 | $ 0.32500 | 3.175% | 4.274% | 2 |
| 2000 | $ 0.33500 | 3.077% | 4.375% | 2 |
| 2001 | $ 0.34500 | 2.985% | 4.502% | 2 |
| 2002 | $ 0.35500 | 2.899% | 4.664% | 2 |
| 2003 | $ 0.36500 | 2.817% | 4.871% | 2 |
| 2004 | $ 0.37750 | 3.425% | 5.053% | 2 |
| 2005 | $ 0.40000 | 5.960% | 4.924% | 2 |
| 2006 | $ 0.44000 | 10.000% | 4.101% | 0 |
| 2007 | $ 0.46000 | 4.545% | 4.013% | 0 |
| 2008 | $ 0.48000 | 4.348% | 3.929% | 0 |
| 2009 | $ 0.50000 | 4.167% | 3.850% | 0 |
| 2010 | $ 0.52000 | 4.000% | 3.775% | 0 |
| 2011 | $ 0.54000 | 3.846% | 3.704% | 0 |
| 2012 | $ 0.56000 | 3.704% |
| Yield | Price |
| 0.5% | $112.00 |
| 1.0% | $ 56.00 |
| 1.5% | $ 37.33 |
| 2.0% | $ 28.00 |
| 2.5% | $ 22.40 |
| 3.0% | $ 18.67 |
| 3.5% | $ 16.00 |
| 4.0% | $ 14.00 |
| 4.5% | $ 12.44 |
| 5.0% | $ 11.20 |
| 5.5% | $ 10.18 |
| 6.0% | $ 9.33 |
| 6.5% | $ 8.62 |
| 7.0% | $ 8.00 |
| 7.5% | $ 7.47 |
| 8.0% | $ 7.00 |
| 8.5% | $ 6.59 |
| 9.0% | $ 6.22 |
| 9.5% | $ 5.89 |
| 10.0% | $ 5.60 |