| 年度 | 数值 | 单位 | 发布日期 |
|---|---|---|---|
| 1986/1987 | 1.401 | 吨/公顷 | 2026-9 |
| 1985/1986 | 1.538 | 吨/公顷 | 2026-9 |
| 1984/1985 | 1.422 | 吨/公顷 | 2026-9 |
| 1983/1984 | 1.247 | 吨/公顷 | 2026-9 |
| 1982/1983 | 1.598 | 吨/公顷 | 2026-9 |
| 1981/1982 | 1.666 | 吨/公顷 | 2026-9 |
| 1980/1981 | 1.615 | 吨/公顷 | 2026-9 |
| 1979/1980 | 1.428 | 吨/公顷 | 2026-9 |
| 1978/1979 | 1.537 | 吨/公顷 | 2026-9 |
| 1977/1978 | 1.54 | 吨/公顷 | 2026-9 |
| 1976/1977 | 1.529 | 吨/公顷 | 2026-9 |
| 1975/1976 | 1.644 | 吨/公顷 | 2026-9 |
| 1974/1975 | 1.574 | 吨/公顷 | 2026-9 |
| 1973/1974 | 1.591 | 吨/公顷 | 2026-9 |
| 1972/1973 | 1.494 | 吨/公顷 | 2026-9 |
| 1971/1972 | 1.43 | 吨/公顷 | 2026-9 |
| 1970/1971 | 1.267 | 吨/公顷 | 2026-9 |
| 1969/1970 | 1.273 | 吨/公顷 | 2026-9 |