| 年度 | 数值 | 单位 | 发布日期 |
|---|
| 1986/1987 | 1.765 | 吨/公顷 | 2026-9 |
| 1985/1986 | 1.444 | 吨/公顷 | 2026-9 |
| 1984/1985 | 1.257 | 吨/公顷 | 2026-9 |
| 1983/1984 | 1.422 | 吨/公顷 | 2026-9 |
| 1982/1983 | 1.377 | 吨/公顷 | 2026-9 |
| 1981/1982 | 1.28 | 吨/公顷 | 2026-9 |
| 1980/1981 | 1.488 | 吨/公顷 | 2026-9 |
| 1979/1980 | 1.452 | 吨/公顷 | 2026-9 |
| 1978/1979 | 1.796 | 吨/公顷 | 2026-9 |
| 1977/1978 | 1.388 | 吨/公顷 | 2026-9 |
| 1976/1977 | 1.515 | 吨/公顷 | 2026-9 |
| 1975/1976 | 0.997 | 吨/公顷 | 2026-9 |
| 1974/1975 | 1.312 | 吨/公顷 | 2026-9 |
| 1973/1974 | 1.616 | 吨/公顷 | 2026-9 |
| 1972/1973 | 1.36 | 吨/公顷 | 2026-9 |
| 1971/1972 | 1.436 | 吨/公顷 | 2026-9 |
| 1970/1971 | 1.42 | 吨/公顷 | 2026-9 |
| 1969/1970 | 1.113 | 吨/公顷 | 2026-9 |
| 1968/1969 | 1.287 | 吨/公顷 | 2026-9 |
| 1967/1968 | 1.074 | 吨/公顷 | 2026-9 |
| 1966/1967 | 1.333 | 吨/公顷 | 2026-9 |
| 1965/1966 | 0.793 | 吨/公顷 | 2026-9 |
| 1964/1965 | 1.015 | 吨/公顷 | 2026-9 |
| 1963/1964 | 0.714 | 吨/公顷 | 2026-9 |
| 1962/1963 | 0.975 | 吨/公顷 | 2026-9 |
| 1961/1962 | 0.981 | 吨/公顷 | 2026-9 |
| 1960/1961 | 0.983 | 吨/公顷 | 2026-9 |