| 年份 | 出口活猪(万头) | 进口玉米(万t) | 进口大豆(万t) |
| 1980 | 316.0 | 163.8 | 56.5 |
| 1981 | 318.0 | 67.6 | 56.8 |
| 1982 | 324.0 | 156.9 | 36.2 |
| 1983 | 321.0 | 211.0 | - |
| 1984 | 3.8.0 | 5.5 | - |
| 1985 | 296.0 | 9.1 | 0.1 |
| 1986 | 310.0 | 58.8 | 29.1 |
| 1987 | 302.0 | 154.2 | 27.3 |
| 1988 | 303.0 | 10.9 | 15.2 |
| 1989 | 297.0 | 6.8 | 0.1 |
| 1990 | 300.0 | 36.9 | 0.1 |
| 1991 | 285.0 | 0.1 | 0.1 |
| 1992 | 290.0 | - | 12.1 |
| 1993 | 272.0 | - | 9.9 |
| 1994 | 270.0 | 0.1 | 5.2 |
| 1995 | 253.0 | 518.1 | 29.4 |
| 1996 | 240.0 | 44.1 | 111.4 |
| 1997 | 227.0 | - | 280.1 |
| 1998 | 219.0 | 25.1 | 319.7 |
| 1999 | 196.0 | 7.0 | 431.7 |
| 2000 | 203.0 | - | 1041.6 |
| 2001 | 196.0 | - | 1394.0 |