| Year | Dec. 2 | Jan. | Feb. | Mar. | Apr. | May | Jun. |
| Cents Per Pound 3 | |||||||
| 1963 | 13.7 | 13.9 | 15.2 | 14.7 | 14.7 | 14.2 | 13.7 |
| 1968 | 10.5 | 12.5 | 14.0 | 13.5 | 13.0 | 13.5 | 13.5 |
| 1973 | 13.5 | 17.0 | 20.0 | 24.0 | 24.5 | 23.5 | 23.5 |
| 1978 | 21.5 | 24.0 | 26.0 | 26.0 | 29.0 | 28.5 | 31.0 |
| 1983 | 26.0 | 27.0 | 28.0 | 26.5 | 25.5 | 27.0 | 29.0 |
| 1988 | 24.5 | 26.0 | 26.5 | 28.0 | 28.5 | 34.5 | 38.5 |
| 1989 | 35.5 | 34.0 | 35.0 | 38.0 | 40.0 | 44.0 | 41.5 |
| 1990 | 27.5 | 29.0 | 33.5 | 34.5 | 32.0 | 35.0 | 34.0 |
| 1991 | 28.0 | 29.0 | 29.0 | 28.0 | 30.0 | 30.0 | 31.0 |
| 1992 | 27.0 | 27.5 | 28.0 | 28.5 | 29.0 | 32.0 | 31.0 |
| 1993 | 29.5 | 30.5 | 31.0 | 32.0 | 33.0 | 34.5 | 34.5 |
| 1994 | 32.5 | 33.0 | 33.5 | 34.5 | 34.5 | 37.0 | 37.0 |
| 1995 | 30.5 | 30.5 | 31.0 | 31.0 | 30.5 | 31.5 | 33.5 |
| 1996 | 36.5 | 36.5 | 34.5 | 34.0 | 35.5 | 38.5 | 41.0 |
| 1997 | 41.0 | 38.0 | 36.5 | 36.0 | 34.5 | 37.0 | 37.0 |
| 1998 | 32.0 | 33.5 | 34.8 | 36.0 | 37.0 | 37.5 | 40.5 |
| Year | Jul. | Aug. | Sep. | Oct. | Nov. | Market Year Average 4 |
| Cents Per Pound | ||||||
| 1963 | 13.8 | 13.6 | 13.0 | 13.3 | 13.7 | 13.8 |
| 1968 | 14.0 | 13.5 | 13.0 | 11.5 | 12.0 | 13.0 |
| 1973 | 28.5 | 37.0 | 28.0 | 22.5 | 19.0 | 23.5 |
| 1978 | 32.0 | 25.5 | 27.5 | 26.0 | 25.5 | 27.0 |
| 1983 | 31.0 | 32.5 | 33.5 | 30.5 | 35.5 | 29.5 |
| 1988 | 43.5 | 41.5 | 41.5 | 38.0 | 35.5 | 34.0 |
| 1989 | 38.5 | 35.5 | 35.0 | 30.0 | 28.0 | 36.5 |
| 1990 | 34.5 | 32.0 | 32.5 | 27.5 | 27.0 | 31.5 |
| 1991 | 31.0 | 31.0 | 31.0 | 29.0 | 27.0 | 29.5 |
| 1992 | 33.5 | 33.0 | 31.5 | 32.5 | 32.5 | 31.0 |
| 1993 | 35.0 | 36.0 | 35.5 | 34.0 | 34.0 | 33.5 |
| 1994 | 35.5 | 34.0 | 34.5 | 32.5 | 30.5 | 34.0 |
| 1995 | 35.5 | 38.0 | 37.5 | 36.5 | 37.5 | 33.5 |
| 1996 | 41.0 | 41.0 | 40.5 | 40.0 | 41.0 | 38.5 |
| 1997 | 40.5 | 39.5 | 36.0 | 34.0 | 33.5 | 37.0 |
| 1998 | 44.0 | 47.0 | 45.6 | 43.5 | ||