Year           Harvested         Yield         Production
                -acres-        -bu/acre-        -bushels-
1960            25,300           46.3         1,172,200
1970            19,800           42.0           835,000
1980            34,900           30.0         1,046,000
1985            48,400           73.0         3,534,000
1990            19,200           88.0         1,690,000
1991            19,100           49.5           946,000
1992            25,200           93.0         2,344,000
1993            22,600           65.6         1,483,000
1994            24,800           94.5         2,344,000
1995            24,400           69.9         1,706,000
1996            30,700          101.3         3,109,000
1997            23,000           97.5         2,242,000
1998            22,100           77.6         1,714,000

Source: Missouri Agricultural Statistics Service