| 年度 | 数值 | 单位 | 发布日期 |
|---|
| 1986/1987 | 1.646 | 吨/公顷 | 2026-9 |
| 1985/1986 | 1.466 | 吨/公顷 | 2026-9 |
| 1984/1985 | 1.261 | 吨/公顷 | 2026-9 |
| 1983/1984 | 1.441 | 吨/公顷 | 2026-9 |
| 1982/1983 | 1.328 | 吨/公顷 | 2026-9 |
| 1981/1982 | 1.037 | 吨/公顷 | 2026-9 |
| 1980/1981 | 1.259 | 吨/公顷 | 2026-9 |
| 1979/1980 | 1.184 | 吨/公顷 | 2026-9 |
| 1978/1979 | 1.737 | 吨/公顷 | 2026-9 |
| 1977/1978 | 1.396 | 吨/公顷 | 2026-9 |
| 1976/1977 | 1.855 | 吨/公顷 | 2026-9 |
| 1975/1976 | 1.007 | 吨/公顷 | 2026-9 |
| 1974/1975 | 1.595 | 吨/公顷 | 2026-9 |
| 1973/1974 | 1.713 | 吨/公顷 | 2026-9 |
| 1972/1973 | 1.234 | 吨/公顷 | 2026-9 |
| 1971/1972 | 1.466 | 吨/公顷 | 2026-9 |
| 1970/1971 | 1.64 | 吨/公顷 | 2026-9 |
| 1969/1970 | 1.327 | 吨/公顷 | 2026-9 |
| 1968/1969 | 1.368 | 吨/公顷 | 2026-9 |
| 1967/1968 | 1.18 | 吨/公顷 | 2026-9 |
| 1966/1967 | 1.316 | 吨/公顷 | 2026-9 |
| 1965/1966 | 0.942 | 吨/公顷 | 2026-9 |
| 1964/1965 | 1.207 | 吨/公顷 | 2026-9 |
| 1963/1964 | 0.887 | 吨/公顷 | 2026-9 |
| 1962/1963 | 1.104 | 吨/公顷 | 2026-9 |
| 1961/1962 | 0.915 | 吨/公顷 | 2026-9 |
| 1960/1961 | 1.21 | 吨/公顷 | 2026-9 |