| 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 | 5 |
| March | 29 |
| April | 0 |
| May | 5 |
| June | 28 |
| July | 0 |
| August | 7 |
| September | 26 |
| October | 0 |
| November | 5 |
| December | 28 |
| Status | Number |
| Cancelled | 0 |
| Discontinued | 0 |
| Omitted | 0 |
| Year | Dividends paid | Increase from previous year | CAGR to 2012 from | Bumpiness to 2012 from |
| 1980 | $ 0.02099 | 12.690% | 21 | |
| 1981 | $ 0.02222 | 5.889% | 12.916% | 22 |
| 1982 | $ 0.02445 | 9.998% | 13.015% | 22 |
| 1983 | $ 0.02778 | 13.630% | 12.994% | 22 |
| 1984 | $ 0.02764 | DECREASE | 13.508% | 23 |
| 1985 | $ 0.03250 | 17.587% | 13.360% | 23 |
| 1986 | $ 0.03417 | 5.126% | 13.689% | 23 |
| 1987 | $ 0.03583 | 4.882% | 14.056% | 24 |
| 1988 | $ 0.03833 | 6.977% | 14.361% | 24 |
| 1989 | $ 0.04333 | 13.043% | 14.419% | 25 |
| 1990 | $ 0.05000 | 15.383% | 14.375% | 25 |
| 1991 | $ 0.05667 | 13.332% | 14.425% | 26 |
| 1992 | $ 0.06333 | 11.767% | 14.560% | 26 |
| 1993 | $ 0.07000 | 10.525% | 14.776% | 27 |
| 1994 | $ 0.07333 | 4.760% | 15.360% | 28 |
| 1995 | $ 0.07333 | NO CHANGE | 16.333% | 28 |
| 1996 | $ 0.07333 | NO CHANGE | 17.439% | 28 |
| 1997 | $ 0.07667 | 4.546% | 18.353% | 29 |
| 1998 | $ 0.08000 | 4.349% | 19.422% | 30 |
| 1999 | $ 0.08667 | 8.332% | 20.321% | 31 |
| 2000 | $ 0.09333 | 7.692% | 21.438% | 32 |
| 2001 | $ 0.09667 | 3.572% | 23.207% | 32 |
| 2002 | $ 0.10000 | 3.449% | 25.380% | 33 |
| 2003 | $ 0.10333 | 3.334% | 28.103% | 34 |
| 2004 | $ 0.11333 | 9.677% | 30.614% | 35 |
| 2005 | $ 0.12000 | 5.882% | 34.590% | 35 |
| 2006 | $ 0.13000 | 8.333% | 39.547% | 36 |
| 2007 | $ 0.15000 | 15.385% | 44.956% | 37 |
| 2008 | $ 0.17000 | 13.333% | 54.154% | 36 |
| 2009 | $ 0.23000 | 35.294% | 61.008% | 39 |
| 2010 | $ 0.31000 | 34.783% | 75.977% | 39 |
| 2011 | $ 0.68000 | 119.355% | 41.176% | 0 |
| 2012 | $ 0.96000 | 41.176% |
| Yield | Price |
| 0.5% | $192.00 |
| 1.0% | $ 96.00 |
| 1.5% | $ 64.00 |
| 2.0% | $ 48.00 |
| 2.5% | $ 38.40 |
| 3.0% | $ 32.00 |
| 3.5% | $ 27.43 |
| 4.0% | $ 24.00 |
| 4.5% | $ 21.33 |
| 5.0% | $ 19.20 |
| 5.5% | $ 17.45 |
| 6.0% | $ 16.00 |
| 6.5% | $ 14.77 |
| 7.0% | $ 13.71 |
| 7.5% | $ 12.80 |
| 8.0% | $ 12.00 |
| 8.5% | $ 11.29 |
| 9.0% | $ 10.67 |
| 9.5% | $ 10.11 |
| 10.0% | $ 9.60 |