| 年度 | 数值 | 单位 | 发布日期 |
|---|
| 1986/1987 | 0.869 | 吨/公顷 | 2026-9 |
| 1985/1986 | 0.939 | 吨/公顷 | 2026-9 |
| 1984/1985 | 0.653 | 吨/公顷 | 2026-9 |
| 1983/1984 | 0.78 | 吨/公顷 | 2026-9 |
| 1982/1983 | 0.821 | 吨/公顷 | 2026-9 |
| 1981/1982 | 0.627 | 吨/公顷 | 2026-9 |
| 1980/1981 | 0.588 | 吨/公顷 | 2026-9 |
| 1979/1980 | 0.508 | 吨/公顷 | 2026-9 |
| 1978/1979 | 0.69 | 吨/公顷 | 2026-9 |
| 1977/1978 | 0.602 | 吨/公顷 | 2026-9 |
| 1976/1977 | 0.973 | 吨/公顷 | 2026-9 |
| 1975/1976 | 0.37 | 吨/公顷 | 2026-9 |
| 1974/1975 | 0.893 | 吨/公顷 | 2026-9 |
| 1973/1974 | 1.413 | 吨/公顷 | 2026-9 |
| 1972/1973 | 0.711 | 吨/公顷 | 2026-9 |
| 1971/1972 | 0.777 | 吨/公顷 | 2026-9 |
| 1970/1971 | 0.712 | 吨/公顷 | 2026-9 |
| 1969/1970 | 0.889 | 吨/公顷 | 2026-9 |
| 1968/1969 | 0.795 | 吨/公顷 | 2026-9 |
| 1967/1968 | 0.772 | 吨/公顷 | 2026-9 |
| 1966/1967 | 0.87 | 吨/公顷 | 2026-9 |
| 1965/1966 | 0.618 | 吨/公顷 | 2026-9 |
| 1964/1965 | 0.896 | 吨/公顷 | 2026-9 |
| 1963/1964 | 0.422 | 吨/公顷 | 2026-9 |
| 1962/1963 | 0.591 | 吨/公顷 | 2026-9 |
| 1961/1962 | 0.693 | 吨/公顷 | 2026-9 |
| 1960/1961 | 0.779 | 吨/公顷 | 2026-9 |