| 年度 | 数值 | 单位 | 发布时间 |
|---|
| 1986/1987 | 2.955 | 吨/公顷 | 2026-9 |
| 1985/1986 | 3.213 | 吨/公顷 | 2026-9 |
| 1984/1985 | 3.47 | 吨/公顷 | 2026-9 |
| 1983/1984 | 3.41 | 吨/公顷 | 2026-9 |
| 1982/1983 | 3.533 | 吨/公顷 | 2026-9 |
| 1981/1982 | 2.652 | 吨/公顷 | 2026-9 |
| 1980/1981 | 3.176 | 吨/公顷 | 2026-9 |
| 1979/1980 | 3.15 | 吨/公顷 | 2026-9 |
| 1978/1979 | 3.531 | 吨/公顷 | 2026-9 |
| 1977/1978 | 3.266 | 吨/公顷 | 2026-9 |
| 1976/1977 | 3.069 | 吨/公顷 | 2026-9 |
| 1975/1976 | 2.763 | 吨/公顷 | 2026-9 |
| 1974/1975 | 3.06 | 吨/公顷 | 2026-9 |
| 1973/1974 | 3.279 | 吨/公顷 | 2026-9 |
| 1972/1973 | 2.45 | 吨/公顷 | 2026-9 |
| 1971/1972 | 2.58 | 吨/公顷 | 2026-9 |
| 1970/1971 | 2.812 | 吨/公顷 | 2026-9 |
| 1969/1970 | 2.869 | 吨/公顷 | 2026-9 |
| 1968/1969 | 2.635 | 吨/公顷 | 2026-9 |
| 1967/1968 | 2.629 | 吨/公顷 | 2026-9 |
| 1966/1967 | 2.606 | 吨/公顷 | 2026-9 |
| 1965/1966 | 2.528 | 吨/公顷 | 2026-9 |
| 1964/1965 | 2.708 | 吨/公顷 | 2026-9 |
| 1963/1964 | 1.593 | 吨/公顷 | 2026-9 |
| 1962/1963 | 2.209 | 吨/公顷 | 2026-9 |
| 1961/1962 | 2.395 | 吨/公顷 | 2026-9 |
| 1960/1961 | 1.931 | 吨/公顷 | 2026-9 |