| 年度 | 数值 | 单位 | 发布日期 |
|---|
| 1991/1992 | 4.785 | 吨/公顷 | 2026-9 |
| 1990/1991 | 5.464 | 吨/公顷 | 2026-9 |
| 1989/1990 | 4.727 | 吨/公顷 | 2026-9 |
| 1988/1989 | 4.301 | 吨/公顷 | 2026-9 |
| 1987/1988 | 4.258 | 吨/公顷 | 2026-9 |
| 1986/1987 | 4.3 | 吨/公顷 | 2026-9 |
| 1985/1986 | 4.484 | 吨/公顷 | 2026-9 |
| 1984/1985 | 4.732 | 吨/公顷 | 2026-9 |
| 1983/1984 | 4 | 吨/公顷 | 2026-9 |
| 1982/1983 | 3.791 | 吨/公顷 | 2026-9 |
| 1981/1982 | 3.74 | 吨/公顷 | 2026-9 |
| 1980/1981 | 3.924 | 吨/公顷 | 2026-9 |
| 1979/1980 | 3.459 | 吨/公顷 | 2026-9 |
| 1978/1979 | 3.963 | 吨/公顷 | 2026-9 |
| 1977/1978 | 3.747 | 吨/公顷 | 2026-9 |
| 1976/1977 | 3.385 | 吨/公顷 | 2026-9 |
| 1975/1976 | 3.178 | 吨/公顷 | 2026-9 |
| 1974/1975 | 3.893 | 吨/公顷 | 2026-9 |
| 1973/1974 | 3.393 | 吨/公顷 | 2026-9 |
| 1972/1973 | 3.104 | 吨/公顷 | 2026-9 |
| 1971/1972 | 3.35 | 吨/公顷 | 2026-9 |
| 1970/1971 | 2.839 | 吨/公顷 | 2026-9 |
| 1969/1970 | 3.204 | 吨/公顷 | 2026-9 |
| 1968/1969 | 2.968 | 吨/公顷 | 2026-9 |
| 1967/1968 | 2.719 | 吨/公顷 | 2026-9 |
| 1966/1967 | 2.33 | 吨/公顷 | 2026-9 |
| 1965/1966 | 2.094 | 吨/公顷 | 2026-9 |
| 1964/1965 | 2.083 | 吨/公顷 | 2026-9 |
| 1963/1964 | 2.341 | 吨/公顷 | 2026-9 |
| 1962/1963 | 2.525 | 吨/公顷 | 2026-9 |
| 1961/1962 | 2.272 | 吨/公顷 | 2026-9 |
| 1960/1961 | 2.468 | 吨/公顷 | 2026-9 |