| 年份 |
种植面积
（千英亩） |
收割面积
（千英亩） |
单产
（蒲式耳） |
产量
（千蒲式耳） |
价格
（$/bul） |
| 2001 |
.74，100 |
.73，000 |
.39.60 |
.2，891，000 |
.4.30 |
| 2000 |
.74，300 |
.72，400 |
.38.10 |
.2，758，000 |
.4.54 |
| 1999 |
.72,370 |
.70,240 |
36.60 |
2,654,000 |
. |
| 1998 |
.72,025 |
.70,240 |
.36.60 |
2,741,014 |
4.93. |
| 1997 |
.70,005 |
.69,110 |
.28.90 |
.2,688,750 |
3.47. |
| 1996 |
.64,195 |
.63,349 |
.37.60 |
.2,380,274 |
7.35. |
| 1995 |
.62,495 |
.61,544 |
.35.30 |
.2,174,254 |
6.72. |
| 1994 |
.61,620 |
.60,809 |
.41.40 |
.2,514,869 |
5.48. |
| 1993 |
.60,085 |
.57,307 |
.32.60 |
.1,869,718 |
6.40. |
| 1992 |
.59,180 |
.58,233 |
.37.60 |
.2,190,354 |
5.56. |
| 1991 |
.59,180 |
.58,011 |
.34.20 |
.1,986,539 |
5.58. |
| 1990 |
.57,795 |
.56,512 |
.34.10 |
.1,925,947 |
5.74. |
| 1989 |
.60,820 |
.59,538 |
.32.30 |
.1,923,666 |
5.69. |
| 1988 |
.58,840 |
.57,373 |
.27.00 |
.1,548,841 |
7.42. |
| 1987 |
58,180 |
57,172 |
33.90 |
1,937,722 |
5.88 |
| 1986 |
60,405 |
58,312 |
33.30 |
1,942,558 |
4.78 |
| 1985 |
63,145 |
61,599 |
34.10 |
2,099,056 |
5.05 |
| 1984 |
67,755 |
66,113 |
28.10 |
1,860,863 |
5.78 |
| 1983 |
63,779 |
62,525 |
26.20 |
1,635,772 |
7.81 |
| 1982 |
70,884 |
69,442 |
31.50 |
2,190,297 |
5.69 |
| 1981 |
67,543 |
66,163 |
30.10 |
1,989,110 |
6.04 |
| 1980 |
69,930 |
67,813 |
26.50 |
1,797,543 |
7.57 |
| 1979 |
71,411 |
70,343 |
32.10 |
2,260,665 |
6.28 |
| 1978 |
64,708 |
63,663 |
29.40 |
1,868,754 |
6.66 |
| 1977 |
58,978 |
57,830 |
30.60 |
1,767,267 |
5.88 |
| 1976 |
50,269 |
49,401 |
26.10 |
1,288,608 |
6.81 |
| 1975 |
54,590 |
53,617 |
28.90 |
1,548,344 |
4.92 |
| 1974 |
52,479 |
.51,341 |
23.70 |
1,216,287 |
6.64 |
|
|
