| 年度 | 数值 | 单位 | 发布日期 |
|---|
| 1991/1992 | 1.5 | 吨/公顷 | 2026-9 |
| 1990/1991 | 1.5 | 吨/公顷 | 2026-9 |
| 1989/1990 | 1.5 | 吨/公顷 | 2026-9 |
| 1988/1989 | 2.5 | 吨/公顷 | 2026-9 |
| 1987/1988 | 1.5 | 吨/公顷 | 2026-9 |
| 1986/1987 | 1.5 | 吨/公顷 | 2026-9 |
| 1985/1986 | 1.333 | 吨/公顷 | 2026-9 |
| 1984/1985 | 1.333 | 吨/公顷 | 2026-9 |
| 1983/1984 | 1.667 | 吨/公顷 | 2026-9 |
| 1982/1983 | 1.333 | 吨/公顷 | 2026-9 |
| 1981/1982 | 1.25 | 吨/公顷 | 2026-9 |
| 1980/1981 | 1.25 | 吨/公顷 | 2026-9 |
| 1979/1980 | 1.2 | 吨/公顷 | 2026-9 |
| 1978/1979 | 1 | 吨/公顷 | 2026-9 |
| 1977/1978 | 1.167 | 吨/公顷 | 2026-9 |
| 1976/1977 | 1.286 | 吨/公顷 | 2026-9 |
| 1975/1976 | 1.222 | 吨/公顷 | 2026-9 |
| 1974/1975 | 1.3 | 吨/公顷 | 2026-9 |
| 1973/1974 | 1.182 | 吨/公顷 | 2026-9 |
| 1972/1973 | 1.077 | 吨/公顷 | 2026-9 |
| 1971/1972 | 1.214 | 吨/公顷 | 2026-9 |
| 1970/1971 | 1.125 | 吨/公顷 | 2026-9 |
| 1969/1970 | 1.222 | 吨/公顷 | 2026-9 |
| 1968/1969 | 1.105 | 吨/公顷 | 2026-9 |
| 1967/1968 | 1.238 | 吨/公顷 | 2026-9 |
| 1966/1967 | 1.261 | 吨/公顷 | 2026-9 |
| 1965/1966 | 1.24 | 吨/公顷 | 2026-9 |
| 1964/1965 | 1.08 | 吨/公顷 | 2026-9 |
| 1963/1964 | 1.107 | 吨/公顷 | 2026-9 |
| 1962/1963 | 1.097 | 吨/公顷 | 2026-9 |
| 1961/1962 | 1.212 | 吨/公顷 | 2026-9 |
| 1960/1961 | 1.18 | 吨/公顷 | 2026-9 |