| 年度 | 数值 | 单位 | 发布时间 |
|---|
| 1991/1992 | 5.181 | 吨/公顷 | 2026-9 |
| 1990/1991 | 3.467 | 吨/公顷 | 2026-9 |
| 1989/1990 | 5.263 | 吨/公顷 | 2026-9 |
| 1988/1989 | 5.298 | 吨/公顷 | 2026-9 |
| 1987/1988 | 5.631 | 吨/公顷 | 2026-9 |
| 1986/1987 | 4.724 | 吨/公顷 | 2026-9 |
| 1985/1986 | 5.434 | 吨/公顷 | 2026-9 |
| 1984/1985 | 4.821 | 吨/公顷 | 2026-9 |
| 1983/1984 | 4.457 | 吨/公顷 | 2026-9 |
| 1982/1983 | 5.347 | 吨/公顷 | 2026-9 |
| 1981/1982 | 4.178 | 吨/公顷 | 2026-9 |
| 1980/1981 | 4.686 | 吨/公顷 | 2026-9 |
| 1979/1980 | 4.607 | 吨/公顷 | 2026-9 |
| 1978/1979 | 3.064 | 吨/公顷 | 2026-9 |
| 1977/1978 | 3.902 | 吨/公顷 | 2026-9 |
| 1976/1977 | 2.52 | 吨/公顷 | 2026-9 |
| 1975/1976 | 5.335 | 吨/公顷 | 2026-9 |
| 1974/1975 | 3.437 | 吨/公顷 | 2026-9 |
| 1973/1974 | 3.663 | 吨/公顷 | 2026-9 |
| 1972/1973 | 4.338 | 吨/公顷 | 2026-9 |
| 1971/1972 | 3.69 | 吨/公顷 | 2026-9 |
| 1970/1971 | 4.008 | 吨/公顷 | 2026-9 |
| 1969/1970 | 3.898 | 吨/公顷 | 2026-9 |
| 1968/1969 | 3.283 | 吨/公顷 | 2026-9 |
| 1967/1968 | 2.807 | 吨/公顷 | 2026-9 |
| 1966/1967 | 3.152 | 吨/公顷 | 2026-9 |
| 1965/1966 | 2.441 | 吨/公顷 | 2026-9 |
| 1964/1965 | 2.5 | 吨/公顷 | 2026-9 |
| 1963/1964 | 2.714 | 吨/公顷 | 2026-9 |
| 1962/1963 | 1.987 | 吨/公顷 | 2026-9 |
| 1961/1962 | 2.294 | 吨/公顷 | 2026-9 |
| 1960/1961 | 2.933 | 吨/公顷 | 2026-9 |