Year           Harvested         Yield         Production
                -acres-        -bu/acre-        -bushels-
1960            300              43.0           12,900
1970          1,100              63.0           69,000
1980          9,400              88.2          829,000
1985         18,000              92.2        1,659,000
1990          5,300              87.9          466,000
1991          6,100              97.0          592,000
1992          7,100             110.8          787,000
1993          4,900              79.0          387,000
1994          6,000              85.0          510,000
1995          5,200              86.0          447,000
1996          8,900              79.5          706,000
1997          6,700             103.6          694,000
1998          5,000             101.0          505,000 

NA Not available.

Source: Missouri Agricultural Statistics Service