| Year | January | April | July | October |
Market Year Average |
|||||
| Dollars Per Head | ||||||||||
| 1963 | 165 | 165 | 160 | 150 | 157 | |||||
| 1968 | 185 | 180 | 190 | 200 | 190 | |||||
| 1973 | 350 | 360 | 395 | 400 | 388 | |||||
| 1978 | 570 | 590 | 620 | 670 | 629 | |||||
| 1983 | 1,050 | 1,030 | 1,030 | 960 | 1,020 | |||||
| 1988 | 930 | 950 | 950 | 950 | 945 | |||||
| 1989 | 950 | 1,020 | 985 | 1,020 | 995 | |||||
| 1990 | 1,050 | 1,100 | 1,120 | 1,130 | 1,100 | |||||
| 1991 | 1,070 | 1,030 | 1,050 | 1,030 | 1,050 | |||||
| 1992 | 1,050 | 1,040 | 1,080 | 1,080 | 1,060 | |||||
| 1993 | 1,110 | 1,090 | 1,110 | 1,110 | 1,110 | |||||
| 1994 | 1,160 | 1,160 | 1,150 | 1,140 | 1,150 | |||||
| 1995 | 1,120 | 1,130 | 1,100 | 1,060 | 1,100 | |||||
| 1996 | 995 | 990 | 1,010 | 1,070 | 1,020 | |||||
| 1997 | 1,050 | 1,050 | 1,050 | 1,000 | 1,040 | |||||
| 1998 | 1,020 | 1,020 | 1,040 | |||||||